Headsup: Unsurprisingly, Knox chickens out of presenting her "proof" on 10 April of being forced to frame Patrick for Meredith's murder when actually under no stress. She's not a good liar. She could face Patrick's tiger of a lawyer and many officers she has slimed. Trial is closed to the press, like the most damning parts of the 2009 trial; a pity that. And see links here for Knox's false framing #2: Rudy Guede as sole killer.
Category: The pack attack

Thursday, July 23, 2009

Case For The Prosecution: #2 The Tough Footprint Evidence

Posted by The Machine




1. Preamble

This series is a summary of the prosecution’s case in five parts, with a commentary on matters of key significance.

The material has been reordered so that evidence presented at several points in the trial can be described in one post here. Sources used are the many published reports and some transcripts made of the testimony. The first post, below, was on the formidable DNA evidence.

In this post we now elaborate the footprint evidence, some of which is easily visible and some of which is only apparent with the use of luminol.

We reported what happened in the court here and here.

Kermit in his Powerpoint series provided us with accurate prior analysis and post analysis of these flootprints and shoeprints, and Kermit also presented a Powerpoint map of the cottage.

2. About luminol

Luminol is a chemical that reacts with the microscopic particles of iron in the blood if a partial but incomplete attempt has been made to clean a bloodstain away.

The blood traces glow a bright blue quite fleetingly in the dark under luminol, just long enough to allow forensic investigators to measure and photograph it.

Luminol evidence can be among the most compelling. If bloodstains show up under luminol, but not to the naked eye, then it is almost a complete certainty that a crime-scene clean-up has been attempted.

Lorenzo Rinaldi is the director of the print-identity division of Italy’s scientific police, the Italian equivalent of Scotland Yard or the FBI. He testified that one visible and three luminol-revealed footprints and a visible shoeprint belonged to the present two defendants, Amanda Knox and Raffaele Sollecito. (Another shoeprint belonged to Guede, convicted last October.)

3. Evidence Against Amanda Knox

Amanda Knox’s footprints were found set in Meredith’s blood in two places in the hallway of the new wing of Meredith’s house. . One print was exiting her own room, and one print was outside Meredith’s room, facing into the room. These bloody footprints were only revealed under luminol.

The fact that there was an absence of any visible bloody footprints from Meredith’s room where Meredith’s blood was to the visible bloody footprint on the blue bathmat in the bathroom that Meredith and Knox shared strongly indicates that some prints were successfully cleaned away altogether.

A woman’s bloody shoeprint which matched Amanda Knox’s foot size was found on a pillow under Meredith’s body. Barbie Nadeau noted the significance of this evidence on The Daily Beast website:

“When the judge asked Rinaldi the size of an unidentified bloody shoeprint found on the pillow below Kercher’s body, he responded, “Between 36 and 38.” The judge then asked Rinaldi what size shoe Knox wears. “The Skecher shoe we sequestered belonging to Amanda Knox corresponds with size 37.”

The significance of the woman’s bloody shoeprint in Meredith’s room is considerable. By itself it debunks the myth that some had propagated for a while, that Rudy Guede acted alone. The bloody shoeprint was incompatible with Meredith’s shoe size.

4. Raffaele Sollecito

Two bloody footprints were attributed to Raffaele Sollecito. One of them was revealed by luminol in the hallway, and the other one was easily visible to the naked eye on the blue bathmat in Meredith’s and Knox’s shared bathroom.

Lorenzo Rinaldi excluded the possibility that the bloody footprint on the blue bathmat was the right size or shape to belong to Knox or Guede instead of Sollecito: “You can see clearly that this bloody footprint on the rug does not belong to Mr. Guede, but you can see that it is compatible with Sollecito.”

Andrea Vogt’s report for the Seattle Post-Intelligencer shows just how meticulous and painstakingly detailed the analysis of the bloody footprints was:

“All the elements are compatible with Mr. Sollecito’s foot,” Rinaldi said, pointing with a red laser to a millimeter-by-millimeter analysis of Sollecito’s footprint projected onto a big-screen in the courtroom. He used similar methods to exclude that the footprint on the bath mat could possibly be Guede’s or Knox’s.

“Those bare footprints cannot be mine,” said Sollecito in a spontaneous statement…. But the next witness, another print expert, again confirmed Rinaldi’s testimony, that the print, which only shows the top half of the foot, matches the precise characteristics of Sollecito’s foot….

Rinaldi’s detailed PPT described methods of image analysis, metric and grid measurement of the ball, toe, heel and arch, as well the particular characteristics of the footprints and shoeprints as well as the actual shoes and feet of Knox, Sollecito and Guede. The three suspects gave their footprints and fingerprints at police headquarters.”

Another print expert also testified that the bloody footprint on the blue bathmat matched the precise characteristics of Sollecito’s foot.

Amanda Knox’s lawyer, Luciano Ghirga, asked Dr. Stefanoni to confirm that other substances like bleach or fruit juice can also react to luminol.

Dr. Stefanoni acknowledged that they do, but pointed out that biologists who work regularly on crime scenes distinguish easily between the bright blue glow of a blood trace and the much fainter glow from other reactive substances


Tuesday, July 21, 2009

Case For The Prosecution: #1 The DNA Evidence

Posted by The Machine



[Above: Prosecutor Manuela Comodi, click for larger image]

1. Preamble

Nearly 200 hours over 23 days.

That is how long the prosecution took to present its voluminous case against Amanda Knox and Raffaele Sollecito, including time taken by the defense teams to conduct cross-examinations.

This series is a summary of the prosecution’s case in five parts, with a commentary on matters of key significance. The material has been reordered so that for example the DNA evidence presented at several points in the trial can all be described in one post here.

Sources used are the many published reports and some transcripts made of the testimony. All the main witnesses will be named in this series with a brief mention of who they are and their qualifications.

Two past posts that may aid in understanding the DNA testimony are Nicki’s post here and Fiori’s post here. All past DNA posts can be found in this area. 

2. The Large Double DNA Kitchen Knife

The double DNA knife is the knife that was sequestered from Sollecito’s apartment. Although there was an imprint of another knife at the scene, and one defense expert argued that there may have been yet another, it remains plausible that this is the weapon that was used to murder Meredith.

Dr. Patrizia Stefanoni was the leader of the forensic team from Rome that carried out all the forensic collections at Meredith’s house.  She testified unequivocally about the knife. A small sample of Meredith’s DNA was found to be in a groove on the blade, and Amanda Knox’s DNA was found to be on the handle.

Dr. Stefanoni noted that there were peculiar diagonal scrapes on the knife blade, which suggested that the knife had been vigorously cleaned.

Both Dr. Renato Biondo, the head of the DNA Unit of the scientific police, and the Kerchers’ own DNA expert, Professor Francesca Torricelli, provided independent confirmation that this forensic finding is accurate and reliable.

The defence teams’ forensic experts are not disputing that Meredith’s DNA was on the blade of the knife. Instead they are arguing that the knife was somehow contaminated for the DNA to actually be there.

Dr Stefanoni has firmly excluded this possibility of contamination in transit or in the laboratory. She testified that there hasn’t been a single instance of contamination in her laboratory for at least the last seven years, and every precaution was taken here to ensure that different traces were not mixed.

A police officer who led a search of Sollecito’s apartment added weight to the prosecution’s assertion that the double DNA knife had been cleaned with bleach. He testified that he had been struck by “the powerful smell of bleach”. 

When Raffaele Sollecito heard that the scientific police had found Meredith’s DNA on the double DNA knife in his apartment, he did not deny the possibility of the DNA being there.

Instead he made a claim about accidentally pricking Meredith’s hand whilst cooking at his apartment. “The fact that Meredith’s DNA is on my kitchen knife is because once, when we were all cooking together, I accidentally pricked her hand.’‘

However Meredith had never been to Sollecito’s apartment and so it seems Sollecito could not have accidentally pricked her hand there whilst he was cooking. In attempting to explain the presence of Meredith’s DNA on the blade, he did so in a way easily disproved and seemed to further implicate Amanda Knox and himself.

3. Sollecito’s DNA On Meredith’s Bra Clasp

An abundant amount of Raffaele Sollecito’s DNA was found on Meredith’s bra clasp, and Dr. Stefanoni has excluded the possibility of any contamination.

This is the bra clasp that was collected some weeks after the first forensic collection and it was conceded that it should have been collected earlier. It was also argued that valid DNA evidence in other cases is often collected weeks or months or even years after the crime when a suspect object is unearthed.

Sollecito’s lawyer Ms Buongiorno is perhaps not surprisingly claiming that this bra clasp was also contaminated in the laboratory. The problem for them is to explain precisely where such an abundant amount of Sollecito’s DNA could have come from, and how it was so firmly imprinted.

The only other instance of Sollecito’s DNA at the cottage was found on a cigarette butt in the kitchen, seemingly an unlikely source at best.

It would seem unlikely that the judges and jury will conclude that the bra clasp was contaminated in a strictly controlled laboratory where Dr. Stefanoni follows rigorous laboratory procedures.  She is an internationally renowned and very experienced forensic expert and was part of a Disaster Investigations Team which identified disaster victims via their DNA.

Alberto Intini is the head of the Italian police forensic science unit. Andrea Vogt reported as follows in the Seattle Post-Intelligencer on Mr Intini’s testimony about the possibility or otherwise of contamination:

“Alberto Intini maintained that the crime scene had not been contaminated and pointed out that laboratory testing revealed none of the investigators’ prints or biological traces. Mr Intini said “In fact, it is the results that tell you if it was done correctly, and I can tell you that in this investigation there was not even one trace of any of our operators.”

He also pointed out that unless contamination has been proved, it does not exist. “It is possible in the abstract that there could have been contamination, but until this is proved, it does not exist.”

The prosecution demonstrated on the final full day of testimony that Meredith’s bra was actually removed with a knife some time after she had been killed.

Judge Paolo Micheli presided over the fast-track trial of Rudy Guede and committed Sollecito and Knox to trial. In looking at the identical evidence he asked “Who had a reason to come back, cut off Meredith’s bra, and move her body some time later?”

The present judges and jury might conclude differently, but Judge Micheli concluded that it would only have been done by someone who knew about Meredith’s death and had an interest in arranging the scene in Meredith’s room to point away from themselves. He discounted Rudy Guede, who apparently went home, cleaned himself up, and then was seen out on the town.

4. Knox Blood With Meredith’s

There were five instances of Amanda Knox’s blood or DNA mixed with Meredith’s blood in three different locations in the cottage in Via della Pergola: the bathroom, the hallway, and Filomena’s bedroom.

Amanda Knox’s blood was found mingled with Meredith’s blood in three places in the bathroom: on the ledge of the basin, on the bidet, and on a box of Q Tips cotton swabs.

Dr. Stefanoni testified that it would have been “strange” that three traces of blood with both Meredith’s and Amanda Knox’s DNA would have been left at different times.

Barbie Nadeau in Newsweek pointed out a reason why the blood stains must have been left on the night of the murder:

“Legal experts who follow this case have suggested that blood evidence cannot be dated and therefore could have been left weeks before the murder. But when Knox testified in her own defense in June, she conceded that there was no blood in the bathroom the day before the murder, effectively dating those blood stains to that night.”

Perhaps Knox had a bloody earring piercing, and maybe a drop landed on a drop of Meredith’s blood. But in three different places? Perhaps it is not surprising that the defence lawyers have not brought up the subject of the mixed DNA in the bathroom in their part of the trial.

Meredith’s blood was found on the top part of the light switch in the bathroom she shared with Amanda Knox. This suggests that it was deposited there when the light was switched on. Meredith’s blood was also found on the toilet lid. There were no DNA or other physical traces of Rudy Guede in that bathroom.

Knox’s DNA and Meredith’s DNA was also found mixed together in a bloody footprint in the hallway of the new wing of the house.

A mixture of Knox’s DNA and Meredith’s blood was also found in Filomena’s room. This seems to be compelling evidence because Knox had never claimed she entered Filomena’s room when she checked the cottage. This room was the scene of the alleged break-in, and there were glass fragments on the floor.

Meredith’s blood had been cleaned up in this room, but it was nevertheless revealed by luminol.

Barbie Nadeau concludes in a Daily Beast report that the mixture of Knox’s DNA and Meredith’s blood in Filomena’s room seems more incriminating than the double DNA knife:

“But perhaps more damning even than the knife was Stefanoni’s testimony that a mix of Knox’s DNA and Kercher’s blood was found on the floor in the bedroom of a third roommate, Filomena Romanelli.”


Saturday, July 04, 2009

Trial: ABC News Reports On The Trial Happenings On Friday

Posted by Peter Quennell




1. Overview

Click above for Rome-based Ann Wise’s report on what happened in court today.

2. Defense Witness Demonstrates Breaking Windows

Prosecutors say Knox and Sollecito staged a break-in to make the murder appear to be the result of a botched theft. A window in the bedroom of Filomena Romanelli, Knox and Kercher’s housemate, was broken, and glass shards and a 9-pound rock were found in the room.

The prosecution presented witnesses and evidence that suggest the window was broken from the inside.

Francesco Pasquali, a retired forensic police officer hired as a consultant by Sollecito’s defense, presented a video in court that included three different scenarios showing how the rock could have been thrown from the outside to break the window, located 13 feet off the ground.

According to Pasquali, the rock was thrown from a terrace across from the window, making the glass “explode” on the inside and spreading glass fragments everywhere on the inside and the outside of the windowsill.

Pasquali said that he had re-created the same conditions that were found in Romanelli’s room at the time of the break-in. Pasquali said he constructed a window of the same size, with the same paint and the same type of glass, and threw the rock through it into a room with the same characteristics as Romanelli’s room. Two video cameras—one inside and one outside—filmed the rock being thrown through the glass.

By analyzing the trajectory of the rock and the projection of the glass shards, Pasquali said he could “exclude that the glass could have been broken from the inside.”


3. But Pasquali Has To Back Down

Prosecutors, however, contend that shutters outside the window could have prevented a rock from breaking it….

The two prosecutors in the case, Giuliano Mignini and Manuela Comodi, made a number of objections when they cross-questioned Pasquali, who admitted that he had not taken into account the fact that there were shutters on the outside of the original window.

Prosecution witnesses have testified that the shutters were partially closed on the morning after the murder, and Pasquali conceded that the closed shutters would have prevented a rock from the breaking the window from the outside.

“It does not take a technician,” Pasquali said. “If the shutters were ajar then the rock couldn’t fit through.”

As we mentioned earlier, the prosecutors also got Pasquali to admit that, besides omitting those shutters, he had also omitted the mostly-drawn curtains in his simulation.

They could have radically altered the broken-glass pattern.

4. ATM withdrawal from Meredith’s bank account

The director of a local bank, Paolo Fazi, testified that 20 euros ($28) had been withdrawn from Meredith Kercher’s account Nov. 2—the day her body was found.

But he also said that the bank accounting date does not necessarily reflect the actual date of the ATM withdrawal, and that only Kercher’s British bank would have that date.

Someone from the British bank is expected to testify in upcoming hearings. Knox and Sollecito are… accused of stealing Kercher’s credit cards, her cell phones and 300 euros ($420) in cash…


5. Guede at disco early AM

A University of Perugia student told the Perugia court that he had seen Guede at a local disco in the early morning hours of Nov. 3, after Kercher’s murder.

Pietro Camplongo said Guede was dancing alone, and that people were keeping their distance from him, because he smelled “as if he hadn’t washed.”


6. Amanda Knox family in court

[Knox during a break] graciously accepted a chocolate from Sollecito, thanking him out loud. It is reportedly the second time he has given her a chocolate.

Knox’s younger sister, Deanna, 20, appeared in court for the first time on Friday, along with Knox’s mother, Edda Mellas… Deanna Knox had been to Perugia and visited Knox in jail, but she had not returned since the trial started in January.

Knox’s half-sister Ashley, 13, also came to court Friday morning but was asked to leave by the judge, because she is a minor.


Sunday, June 21, 2009

How The Media Should Approach The Case If Justice Is To Be Done And SEEN To Be Done

Posted by Hellodalai


The American media are really playing with fire here.

This is one of the most seriously misreported cases in recent history, and a line really needs to be drawn.

Much of the media are doing no digging, consulting no Italians, repeatedly recycling discredited sources and those with a vested interest in the outcome, stating facts that are not facts, ignoring other facts that really are facts, revealing no understanding of how the Italian judicial process works, and often depicting the Italian professionals with contempt.

And so far no-one is really calling them on it.

From this perspective, I have been reading all the articles and information on this case for the past few days. I too was very disappointed in the NY Time pieces by Egan.  Rather than attempt to discuss the facts and evidence that are known so far, he painted “broad brush” strokes to argue that this trial is unfair.

The TIME magazine report just below - where the reporter basically allowed a Knox advocate to state her position unchallenged - is equally mediocre in terms of investigative and reporting quality. It was one of dozens that have done that.

Here is my own analysis of the case which I advance as the appropriate depth that EVERY reporter and print and TV analyst should aim to achieve before they start telling the rest of us what to think.

Motive

Egan points out that Amanda Knox had no motive to kill or participate in killing Meredith Kercher.

I agree that there seems to be little evidence on this issue.  One roommate testified as to tensions between Amanda and Meredith.  Roommate tensions are common, though, and rarely lead to murder.

Neither Rudy Guede, who has been convicted already, nor Raffaele Sollecito, who was Amanda’s boyfriend of less than two weeks, seemingly had motives, either.

All three were young adults who liked alcohol, music, marijuana, and sex (although Rudy has been described as a petty thief and small time drug dealer; other reports state he had no criminal convictions). None seemed likely to erupt into a murderous rage.

One of the downstairs male students testified that Guede expressed some interest in Amanda and said that Meredith was beautiful.  Sollecito wrote in a newspaper column that he was a 23 year old virgin when he met Amanda.

So Sollecito was vulnerable to Amanda’s influence.  Guede may have wanted to gain Amanda’s favor.  Add alcohol and drugs and group dynamics and - the threesome may have spun out of control.

Since the murder, Amanda’s behavior could certainly be questioned.  Who does cartwheels at a police station during an investigation of their murdered roommate?  What defendant wears a shirt to their murder trial that says “All you need is love” when the prosecution is trying to portray them as someone with out-of-control sexual behavior?

If this case rested solely on whether Amanda had a motive to kill Meredith, I would agree with Egan’s stance that the trial is unfair.  Egan seems to stop at that issue, however, and seems unwilling to examine all the evidence objectively.

DNA Evidence

One of the better reports on the case included this statement:

“But perhaps more damning even than the knife was Stefanoni’s testimony that a mix of Knox’s DNA and Kercher’s blood was found on the floor in the bedroom of a third roommate, Filomena Romanelli. While it might not be noteworthy to find mixed genetic traces of residents of the same house, Romanelli’s room is critical in this crime.

Her window was broken with a large rock that prosecutors believe was used to stage a break-in. The mixed Knox-Kercher trace was found after investigators used luminol, a substance used in forensic science to bring out blood that had been cleaned up.

In addition, Stefanoni testified that a mixture of Knox’s DNA and Kercher’s blood was found on the drain of the bidet, on the bathroom sink, and on a Q-Tip box in the girls’ bathroom.”

That is FOUR different blood samples with mixed Knox-Kercher DNA.  Yes, it does seem that the investigative methods were sloppy and not all samples may be reliable (I acknowledge that there are some problems with the prosecution’s case).

But I have yet to read even one article where a reputable DNA expert can explain why sloppy police procedures would result in four separate mixed blood samples.  I did read one explanation that Amanda bled from a pierced ear—thus providing some explanation, although weak, for why her blood may have been in the bathroom.  That doesn’t explain why her blood was in the bedroom of Filomena Romanelli (another of her roommates) or why her blood was found mixed with Meredith’s - or why her blood would be recoverable from an area that had been cleaned after the murder to eliminate evidence.

Similarly, the DNA evidence from Sollecito, found on Meredith’s bra clasp is not explained away by scientific reasoning.  True, the police left the clasp in Meredith’s room (which was sealed) for weeks and did not retrieve it, but DNA is not transferred by “flying DNA”; there is no “innocent” scientific explanation why Sollecito’s DNA (not sloughed dead cells, which do not contain DNA) would affix itself to a bra clasp worn by the murder victim after the clasp had been torn from her body.

As to the DNA evidence found on the knife located in Sollecito’s apartment,  the DNA sample from Meredith was very tiny, according to reports, and the DNA from Amanda could be explained by her using the knife at Sollecito’s apartment. (Sollecito explained Meredith’s DNA by stating she had come to his apartment for dinner with Amanda and that he had accidentally pricked her. But no witnesses have been found who remember Meredith ever talking about going to Sollecito’s apartment)

True, the knife is not the same size as most wounds on Meredith, but it is the same size as one wound. The knife showed evidence of bleach cleaning and some scratches (Sollecito’s apartment showed a lot of evidence of bleach cleaning, even though his maid did not use bleach to clean).

Clean up motives and evidence

I have yet to see a careful review of the testimony and possible conclusions that may be drawn from the known facts and circumstantial evidence, including the clean up after the murder—which, to me, are very compelling.

The neighbor has testified that she heard a very loud, long scream that night (presumably Meredith’s last), followed not long thereafter by the sounds of two to three different people running from the area (it was unusual to hear people running at that time of night).  The neighbor was 69 and could not remember exactly the date she heard the screaming, but she was firm that it was the night before Meredith’s murder was discovered.

It is not a stretch to link the screaming to Meredith, given that loud, long piercing screams are uncommon.  Also, a murderer or murderers would realize that Meredith’s scream may bring the police at any moment—so running from the crime would be expected. 

The uncontradicted testimony is that there was a fair amount of effort to “clean up” the crime scene (the defense merely claims that Knox and Sollecito were not involved). It also appears that whoever came back for the “clean up” also broke a window in Filomena’s bedroom (as mentioned, one of the two other roommates living upstairs; there were also four male students living downstairs in a separate unit), in an attempt to throw the investigating police off the scent. 

Filomena testifed that she found clothes strewn around her room the next day and that she had left the room tidy.  She testified that glass from the window broken in her bedroom was on top of those strewn clothes.  If the window was broken by someone entering the home who was intent on rape and/or robbery, then the glass would not be on top of the clothes as those clothes would not have been under the window then (Filomena also testified that she had valuables in plain view in her bedroom and that none were taken).

The evidence suggests that someone placed these clothes around the room and THEN broke the window to “stage a scene” (as there is no explanation for why anyone would have any motive to randomly take clothes and throw them around a room).

Let’s start with Guede first and the assumption that he came back to the home that night - either by himself - or with someone other than Amanda and Sollecito.

Guede’s motivation to come back to the crime scene would be to clean up the most incriminating evidence against him and to stage this crime scene to lead the police in a direction away from him.

Guede left DNA inside Meredith, bled on Meredith’s body, and left a bloody hand print on the pillow underneath Meredith’s head.  He also left feces in the bathroom toilet (the bathroom near Filomena’s bedroom - -not the “bloody” bathroom between Meredith and Amanda’s bedrooms).  He would know that if he came back to clean.  He would know that that evidence would be the strongest against him.

During this “clean up phase,” the DNA inside Meredith, Guede’s blood on Meredith’s body, the bloody hand print, and Guede’s feces in the bathroom toilet were all left untouched. 

The “clean up phase” spent a lot of time in the bathroom next to Meredith’s bedroom (it was also next to Amanda’s bedroom), the hallway, and Filomena’s bedroom, where the “break-in” was staged (it is possible at least part of this crime occurred in the bathroom, as Meredith’s blood was found on the bathroom light switch when it was in an up position - meaning it was touched when the light was on.  The bathroom had numerous droplets of her blood, some of which were commingled with Amanda’s blood.)

Despite the cleanup in Filomena’s bedroom, the police were still able to obtain DNA samples.  Guede’s DNA was not found in either the bathroom or Filomena’s bedroom.

Six bloody footprints from bare feet were identified.  One was visible to the naked eye in the bathroom and five were visible only after the police used luminol, which allows blood evidence cleaned by bleach to become visible under a special light.  The luminol did reveal five bloody footprints that had been cleaned up (one shoe print was also found under Meredith’s pillow - the print is consistent with the size of Amanda’s shoe).

None of the six bloody footprints are consistent with the size of Guede’s feet.  All six of these footprints are consistent with the size of Amanda and/or Sollecito’s feet.

Why would Guede concentrate his clean-up efforts on areas where there is little to no evidence from him and ignore the areas where there is substantial evidence of his involvement?  Wouldn’t he at least flush the toilet?

As to the staged “break-in,” would Guede be motivated to set this up?  If the police believed a “break-in” had occurred, would they then be led away from investigating Guede as a suspect?

If the police believed that a break-in had occurred, then they would focus on looking for someone who was either a complete stranger to Meredith or someone she would not readily admit to her home late in the evening if they knocked on her door unanounced.  Guede was not a complete stranger.  One of the four male students who lived in the separate unit downstairs testified that Guede sometimes came to the apartment of the four male students and met and talked to Amanda and Meredith there (the testimony is that Meredith dated one of those four male students).

The evidence suggests that Guede only slightly knew Meredith. So, Guede was not someone who could knock unannounced on Meredith’s door late at night (at least 9:30—after Meredith talked to her mother) and be readily admitted. 

Guede had no motivation to stage a “break-in” because a break-in would in no way lead the police away from his scent.  Plus, there is no evidence that Guede was ever in Filomena’s bedroom where the “break-in” was staged.  If he had participated in this staging, a footprint consistent with the size of his feet should have been illuminated by the police’s luminol.

It wasn’t.

Conclusions that jurors would normally draw from facts and the circumstantial evidence relating to the “clean up” and “break-in” point to someone OTHER than Guede participating in the “clean-up” and “staged break-in.”

Let’s now look at the assumption that Amanda and her boyfriend, Rafaelle Sollecito, were the ones who came back for the “clean up” and “staged break-in.”

If Amanda and Sollecito were with Guede when the murder occurred (accounting for the extra footsteps running away shortly after the last scream of Meredith) and then came back to get rid of evidence of their guilt, their motivation would be to clean up their blood and DNA evidence and lead police away from their scent.

As for whether Amanda bled that night, another roommate of Amanda’s and Meredith’s, Laura, testified that she saw a a mark under Amanda’s chin the day after the murder that was not there the day before the murder; Laura testified the mark was not a hickey as a hickey would have been purple and more round. 

I have read two different comments on this issue from Amanda’s father.  One stated that the mark was merely a hickey and is evidence she spent the night with her boyfriend.  Another was that a physician examining Amanda on Nov. 6th - -the murder occurred the evening of Nov. 1st - did not note a mark under the chin.  (Interestingly, the police interrogating Amanda the next day did not report such a mark, either).

I then found a photo that was posted online taken of Amanda the day after the murder.  It clearly shows a mark under her chin—and would account for her blood being found at the apartment.



[click for larger image]

If Amanda and Sollecito did the “clean up,” they would be motivated to leave evidence of Guede’s guilt and point the police in his direction.

Forensics don’t show either way whether bleach was used to clean up Meredith and Amanda’s apartment, though it was used in Sollecito’s apartment AND on the knife found in his apartment containing the DNA of Meredith and Amanda. 

The Conad store owner reported the presence of Amanda in the household cleaners part of his store early on the morning after the murder (when Amanda and Sollecito contend they were asleep) although rumored receipts for bleach were not presented at trial.

Meredith’s body, which contained Guede’s DNA and his blood (mixed with hers) was not cleaned and Guede’s feces was not flushed from the toilet.

The bathroom, which even after the cleaning, contained Amanda’s blood mixed with Meredith’s and a bloody footprint which is consistent with the size of Sollecito’s foot (trial testimony was that it was “likely” Sollecito’s footprint), had a lot of cleaning activity.

The hallway and Filomena’s bedroom, which even after the bleaching contained Amanda’s blood mixed with Meredith’s and bloody footprints, was the site of a lot of cleaning activity (these footprints were all consistent with the size of the feet of Amanda and Sollecito, but not consistent with the size of Guede’s feet) .

The “cleaning” evidence, and conclusions which may be drawn from it, point to Amanda and Sollecito as participants.

Would Amanda and Sollecito have a motive to stage a break-in?  Amanda obviously had a key to the unit and did not have to break into her own apartment.  If there was no sign of a break-in, police would probably focus on people who had a key to the apartment or friends of Meredith she would readily admit to her apartment at 9:30 at night.  If there was no sign of a break-in, police would question Amanda and Sollecito at length - and they would obviously know that.

Amanda and Sollecito had a strong motive to stage a break-in to focus police on looking for a stranger, or someone like Guede who only knew Meredith very casually.

What about the next morning?  Let’s first assume Amanda was innocent and she is being truthful when she testified that she did not come home until around 11:30 the next morning.

Amanda testified that when she came home around 11:30 a.m. that the apartment door was open, that there was visible blood in the bathroom (which would have been numerous scattered blood drops, a ten inch smear on the bathroom door, and a bloody footprint on the floor) and that there was feces in a toilet.  Amanda says that she called out for Meredith and no one answered.

She then took a shower and went to Filomena’s bathroom and used her dryer to dry her hair (this is the bathroom with Guede’s feces;  this toilet is different than American toilets in that it had a large flat area so that the standing water in the toilet did not submerge the feces) and returned to her boyfriend’s apartment.

If Amanda were truly innocent when she arrived that morning, wouldn’t she also try to open the door to Meredith’s bedroom after Meredith did not answer, even when she banged on her door more than once?  Amanda’s fingerprints were not found on the door knob and she has never testified that she tried to open the door.  Sollecito testified that when he arrived later with Amanda that he tried to open the door - and his fingerprints are on the door knob.

If Amanda were innocent, wouldn’t she text Meredith, as she did several times two days before?  Wouldn’t she call both of Meredith’s cell phones and let them ring to see if they were in her bedroom? (Phone records show she called each phone one time; one for three seconds and the other for four seconds, despite Amanda telling Filomena that day that she had called Meredith’s cell phones and that the phones just kept ringing) 

If Amanda were innocent, wouldn’t she also call out for Filomena and Laura - because she would not know for sure if they might have returned that morning (she knew Filomena had spent the night in town and that Laura was in a nearby town)?  Wouldn’t she look into their bedrooms (Filomena’s door was closed that morning, according to Amanda; Sollecito says it was open) and have noticed that Filomena’s bedroom window was broken and her clothes were strewn about? (When Amanda first called Filomena she did not mention that Filomena’s bedroom had been broken into).

If Amanda were innocent, wouldn’t she have just flushed the exposed feces down the toilet?

If Amanda were innocent and truthful, wouldn’t her hair three hours later look like it had been washed and blow dried that day?  Look again at the photo posted above.  It was taken about three hours after the alleged washing and blow drying.  Is that the hair of a woman who washed and blow dried her hair three hours earlier?

Wouldn’t Amanda have noticed that the lamp in her bedroom, which was the only source of light for that room, was missing? (Police later found it in Meredith’s room).  Wouldn’t she have immediately noticed the missing lamp when she first entered her bedroom that morning so that she would have immediately either left the apartment without taking a shower or called the police to come over? (Police and phone records show that Sollecito didnt call them until 12:54, even though the Postal and Communications Police had been at the apartment with Sollecito and Amanda since 12:26 - the Postal Police unexpectedly showed up at the apartment because Meredith’s cell phones had been found.)

People react differently to unexpected happenings and Amanda may not have done all of those things, but surely she would have done at least one of them.

If Amanda were truthful about showering and drying her hair, wouldn’t her fingerprints be in both bathrooms? (Since these activities would have occurred AFTER the clean up).  The police only found one of her fingerprints in her residence - on a glass in her kitchen.

As to this time frame, what about the recent trial testimony of Amanda’s mother that Amanda told her in their first phone call that day that she thought someone was in her apartment?  Cell phone records place that call at 12:47, some 21 minutes after the Postal Police arrived. (A nearby video camera documents that time, as does Postal Police log records;  the defense has tried to argue that the Postal Police did not arrive until after 1:00 p.m., but do not have evidence for that position.  In fact, Filomena testified that she arrived back at her apartment before 1:00 and that the Postal Police were already there.)

Postal Police testified that both Amanda and Sollecito were in Amanda’s bedroom with the door closed at 12:47 - the bedroom with no lamp or overhead light (neither Amanda nor Sollecito mentioned to the Postal Police or Filomena when they emerged from that bedroom after many minutes that the only lamp in the room was missing).

Let’s keep assuming Amanda was innocent.  Would she have come back to her apartment with Sollecito, still not having called police, and then start a load of washing of Meredith’s clothes? (The Postal Police said the washing machine was running when they entered;  Filomena, who arrived a little later, said that the washing machine was still warm and contained Meredith’s clothes.)

Amanda has testified that she got out a mop and bucket the first time she went to her apartment that day and took it back to Sollecito’s because there was water on his apartment floor from water used in cooking pasta the night before (Sollecito said, however, that the water was from a broken pipe;  Sollecito’s diary written in prison talks of a dinner of stir fry mushrooms and vegetables).

Who has water spills from cooking pasta so large that the next day it is still puddled to the degree it needs to be mopped?  Who voluntarily carries a mop and bucket several blocks to clean up water from cooking pasta the night before? (Especially a person who has been labeled in trial testimony as messy and unkempt in their cleaning habits).

If Amanda were innocent, wouldn’t she and Sollecito have called the police after Sollecito tried to open Meredith’s locked bedroom door and couldn’t open it?

Instead of calling the police, Amanda and Raffaele went outside and stood next to the mop and bucket.  Why didn’t they just put the mop and bucket back up in the apartment when they first arrived?  Why leave it outside the apartment?  Why then go back out and stand next to the mop?

If Amanda and Sollecito were innocent, that means that Guede (and perhaps one or two accomplices) murdered Meredith, then ran away, and then came back at some point and cleaned up the crime scene PARTIALLY (but ignoring and leaving the most damning evidence against him) and THEN GUEDE CAME BACK that morning after Amanda had showered and left - so that GUEDE could do a LOAD OF WASHING of Meredith’s clothes - presumably blood stained, all the while ignoring his feces in the toilet and his bloody hand print on the pillow under Meredith’s body - only for GUEDE to then leave again right before Amanda and Sollecito arrived (so the washing machine would still be running when the Postal Police arrived a short while later).

What type of person or persons would come back to a crime scene to clean it up?

The most likely person to return to a crime scene for a clean up is someone who knows that they can do a clean up with little chance of being caught. 

Guede might have known that the four male students downstairs were all away due to his occasional appearances there.  But how would Guede know that Filomena and Laura, the other two upstairs roommates, would not come back either that night or in the morning?

Amanda and Sollecito, on the other hand, would know that everyone who lived in the house would be gone and that they could do a clean up that would take some time and have a good chance of not being caught in the act.  Only the unexpected appearance of the Postal and Communications Police interrupted the mopping and cleaning (as there was still a ten inch blood smear on the bathroom door near Meredith’s bedroom and numerous visible blood droplets).

No one else other than Amanda and Sollecito, and who may have been involved, had such knowledge.   

Conclusion

     

The facts, testimony, and conclusions that may reasonably be drawn from the evidence, including circumstantial evidence (that is what juries do all the time), lead me to believe that Amanda will be found guilty.

Let any reporter or analyst run the case through their minds at this depth and then make sure that at a minimum, they keep their cool and don’t misrepresent.

When I read an article or blog in the New York Times or Time magazine, I expect thorough, well-reasoned, well-researched, investigative journalism. Judicial cases DEMAND it.

Instead, here I have found articles that IGNORED the evidence and some very mediocre journalism. What happened to journalistic standards?  Where is the public outcry against the U.S. media’s handling of this case? 

For the sake of true justice, a line now needs to be drawn.


Trial: Defense Witness Makes A Claim About The Second Knife

Posted by Peter Quennell





Click above for the report from an unnamed BBC correspondent. The key parts are quoted below.

The issues today were the role of the second smaller knife which the prosecution had already proven part of the crime; and the size of Meredith’s room.

The stab wound in the neck of a British student killed in Italy was from a shorter knife than the one thought to be the murder weapon, a court was told.

A coroner said that Meredith Kercher was killed with a 3ins to 3.5ins knife, a lawyer for the Kercher family said. But prosecutors say a 6.5ins knife found at the home of one of the accused matched Ms Kercher’s wounds…

Coroner Francesco Introna was called to give evidence for the defence, according to a lawyer representing the Kercher family, Francesco Maresca.

Prosecutors say a 6.5ins knife found at Mr Sollecito’s house matched the wounds and could be the murder weapon. They also say the knife had Ms Kercher’s DNA on the blade and that of Ms Knox’s on the handle.

As well as questioning the length of the knife, Mr Introna also said that no more than a single attacker could have assaulted Ms Kercher, according to Mr Maresca.

However, when cross-examined by prosecutors, Mr Introna conceded he had never been to the house where Ms Kercher was killed and used forensic data to work out the size of the bedroom.

Mr Maresca said that when the court went to inspect the scene of the crime in April, six or seven people could fit into the room.

The reporting today as the defense launches into its portion of the trial to attempt to rebut the evidence seemed thinner than earlier in the trial.


Friday, May 29, 2009

Trial: More On The Violent Crimes Unit’s Reconstruction Of The Violent, Prolonged Attack

Posted by Peter Quennell



Grim-faced expert witnesses from the Violent Crimes Unit in Rome enter court

1. Reconstruction Of The Attack On Meredith

Judge Massei closed the court for much of the time. No English-language reporters were there.

Nevertheless, reports in La Nazione and other Italian media described the reconstruction of the final attack on Meredith in the court with the aid of many photographs and graphics.

Giuseppe Codispoti, Director of the Analysis of Violent Crime Unit, said in his deposition that the evidence pointed to three subjects in addition to the victim being present in the room at the time.

The evidence included the many wounds on Meredith, the state of her clothing, and the locations and shapes of the bloodstains on the walls, the wardrobe, and the floor.

Wounds to Meredith’s right hand pointed to a desperate attempt to ward off one or several attackers with knives while she was being held by her other arm.

The director of the Violent Crime department, Edgardo Giobbi, told the court that when, on the day after the murder, he handed Knox (not yet a suspect) a pair of shoe covers before entering the apartment below hers, she swiveled her hips and said “oopla.” This attitude made him turn his “investigative attention” on her, he said.

This was dramatic and telling testimony, and for some in the courtroom apparently quite hard to take.

Below: One of the images used in their detailed reconstruction of the final frenzied act in Meredith’s bedroom that suggested three people had to be involved.




2. Prior Testimony That Relates

Judge Micheli summarized the same forensic evidence and concluded for purposes of convicting Rudy Guede and of sending Knox and Sollecito to trial that it did point to three people being involved.

Judge Micheli also concluded that, as part of a cover-up, Meredith was later moved from the location below (by the wardrobe and the window) to where she was found, several feet to the left (by the bed).

3. Defensive PR Reaction To This Tough Talk

In their attempt to ridicule and undermine this compelling evidence, CBS News (48 Hours) in their recent very slanted report repeatedly showed bizarre caricatures of this scene by an Italian cartoonist.

None were remotely correct. That was not, we think, CBS News’s finest hour. They have been very silent on it since.

The paid Candace Dempsey defense blog on the Seattle PI website took a shot at ridiculing the reconstruction image above.

Something rather incoherent to do with not being specific enough about the figures. But the image above was one of a number that the witnesses used.

As real crime experts in the field would all know, it was deliberately not more specific because it incorporated only the known hard evidence.

Contacts of ours in NYC associated with law enforcement are giving the reconstruction an A. It was a careful and clever bit of work.


Trial: La Nazione On Testimony About The Attack And What The Blood Traces Suggest

Posted by Peter Quennell


La Nazione is one of Perugia’s newspapers. Click above for their early report, in Italian.

1) On today’s testimony.on what the blood traces suggest

Before Meredith died, she struggled to free herself from the constraint of one of the attackers, and she brought her left hand up to her devastated neck after the fatal knife attack. This is the evidence proven by the bloodstains found on the hand of the English student and, in particular, her index finger.

This is one of the elements that helps to reconstruct the dynamics of the crime conducted by the forensics experts of the Violent Crime Unit to be presented in today’s depositions in their case against Amanda Knox and Raffaele Sollecito accused of the murder and rape of their friend..

2) On the testimony scheduled to come next

The tight schedule of hearings ordered by the President of the Court, Giancarlo Massei, includes 5 and June 6 to hear the witnesses for the civil parties (lawyers Francesco Maresca and Serena Perna) who assist the victim’s family.

Testifying on the 5th should be the advisers (legal and medical forensic geneticist) while on the 6th it will be the turn of Meredith’s mother, Arline, and then her sister Stephanie and brother Lyle. They will talk about why she had chosen to study in Perugia, and the last telephone contacts before her murder.

On June 12th Amanda Knox is expected to be examined by her lawyers, Luciano Ghirga and Carlo Dalla Vedova. The enigmatic Seattle student might still decide to escape the barrage of questions at the last minute.

On the 13th the first witness will be Patrick Lumumba, the civil party up against the American for libelous slander. And then the witnesses for the defenses will commence testifying.


DNA Evidence: The Myths Start To Come Crashing Down

Posted by Nicki

[click for larger image; rule and annotations by Kermit]


The DNA evidence is proving to be as well-handled and as incriminating as DNA evidence ever is at such trials.

The last two hearings have very publicly exposed several of the key myths which have been aggressively propagated over the Internet and through other media for many months.

Let’s first speak about the double knife DNA. It has now become pretty obvious that:

  • It doesn’t match half of Italy as falsely claimed
  • It doesn’t have a 20% chance of being Meredith’s as falsely claimed
  • Stefanoni never declared herself that the DNA “was unreliable” as falsely claimed
  • The DNA has not been amplified “500 times” as falsely claimed

Patrizia Stefanoni has not stated that Meredith’s DNA was extracted 500 times from the knife sample, as some people with what seemed a google-level knowledge of molecular biology were claiming to muddy the waters.

The DNA was actually extracted 50 times from Meredith’s specimens and was used to compare it to other biological traces, including the one found on the knife. And it provided the forensic team with good samples to be compared to the traces found on the knife.

Two genetic profiles are identical and therefore belong to the same individual if a) they are in the same position, and b) they have identical shape and dimension. In this case, each peak produced in the original samples exactly corresponds to the peaks yielded by the knife sample, position, shape and dimension”¦ Say so long to the “matching half of Italy” myth!

Furthermore, Stefanoni excluded any possibility of contamination in the lab, stating that it had never once occurred in her lab for at least the last seven years, and every precaution was taken in order to exclude possibility of contamination so that different traces are not mixed. 

Contamination during the collection phase was also excluded: the forensic team that found the knife was a different one from those who searched the cottage, so how could Meredith’s DNA possibly have been “transferred to the knife”? 

Furthermore, the knife was put in a shoe box after it was bagged, and it stayed there until it reached the lab. And once again… DNA doesn’t fly, it doesn’t creep, and it sure doesnt penetrate a plastic bag!

Now let’s speak about the bra clasp.

The DNA found on the clasp has been defined as abundant and identified as belonging to Sollecito without any doubt. It should have been collected earlier in the process, but DNA evidence is often collected weeks or months after the crime when an object involved is unearthed.

The chances that it has been contaminated are at zero: the sample was found under the pillow on November 2, during the first search, and collected on December 18th when the second search took place by a different team.

During this entire time, the clasp was laying on the floor of what has been testified to have been a completely sealed crime scene. So when and how could any contamination occur?

Excluding a spontaneous migration of Sollecito “˜s DNA on the clasp from some unidentified location in the murder room or in the cottage, it could have only taken place during either the first or the second handling of the sample, so the fact that the clasp was recovered weeks later really bears no relevance.

And additionally, where could any abundant amount of Sollecito “˜s biological matter come from, if besides that on the bra clasp, the DNA corresponding to his genetic profile was only found on a cigarette butt? 

Perhaps this is why Sollecito’s lawyer Ms Buongiorno is now claiming that the bra clasp was contaminated in the laboratory. She is reduced to having to claim that in effect Dr Stefanoni applies strict laboratory procedures when testing Guede”˜s or other peoples’ specimens, but somehow miserably fails when the samples belong to Sollecito and Knox.

Finally, let’s not forget that Rudy Guede’s DNA was not found “all over” the victim, but only on the right side of her bra, on the left cuff of her jumper, and inside her body. If passive transfer of DNA is so easy to happen, and if Guede is the only one who physically attacked Meredith, how comes his DNA was found only in these three places on the victim’s body?

DNA is NOT easy to transfer. Dr Stefanoni is absolutely correct when she says that “transfer of DNA must not be taken for granted nor it is easy to happen, and more likely to take place if the original trace is aqueous, not if it is dry”.

About the possibility of contamination having taken place in the lab, this is a risk that everyone working with PCR is well aware of. It is certainly not probable that it could occur every time a biological sample is tested. In fact, it is very unlikely to happen when the routine strict precautions are taken.

And there is no doubt that Dr Stefanoni was extremely cautious when handling any of these samples. 

I can see the reason for the improbable reach of the defense teams: since their clients deny any involvement, the positive DNA results “must” be contaminated - what else could they possibly say? Regarding this evidence, it is the only argument that they have available.

Finally, Dr Stefanoni has an international reputation and is considered one of the best in the field today. Questioning her credentials really makes no sense at all. But those too have come under attack.

Edited to add: On the issue of DNA transfer, from today’s hearing (La Nazione)

“The contamination theory has been discussed again today: Ms Bongiorno repeatedly asked the forensic witnesses information regarding the techniques used to collect the samples found in Meredith’s house, but PM Manuela Comodi showed the Court that contamination did not occurr by asking the forensic witnesses: “Using the same gloves, you have touched the victim’s socks after working on other samples. Could you tell me what the result of the sock analyses was?”

The witness answered:  “No foreign DNA nor genetic traces have been found”. Another demonstration that DNA passive transfer just doesn’t occur so easily.  Differently, the probabilities of obtaining a contaminated sample would be so high that DNA testing would hardly be of any use in crime investigations.


Saturday, April 25, 2009

Explaining The Italian Theory Of The Attack That Is Being Lost In Translation

Posted by Arnold_Layne





At the trial, Gioia Brocci from the forensic department in Rome just told the court that Knox had reacted visibly when taken into the house’s kitchen after the murder.

She said: “˜‘A drawer with cutlery in it was opened, and I remember that Knox started to tremble, she closed her eyes and put her hands over her ears…. She reacted in such a way that she had to be escorted out of the room and taken into the corridor by the officers from the Perugia Flying Squad who were with her.’‘

Here is one explanation that extends from that testimony. It is in sharp contrast to “A Drug-Fuelled Extreme-Sex Game Gone Awry” which definitely is not what Italians are hearing. 

This scenario leads to the inference that it starts as something of a pre-intended taunting and hazing led by an angry Knox intent on payback. It does not start as a preconceived murder because there seems no preparation for a premeditated murder.

When Knox and Sollecito arrive at the cottage, they bring a jackknife and a kitchen knife.  The kitchen knife may be wrapped in paper and carried in Knox’s handbag.  When they arrive, Sollecito perhaps puts the large knife someplace inconspicuous but handy. 

That place could of course be the knife drawer in the kitchen that Knox later reacted to.

They have collected Guede in the park, Knox lets him in, and the Treacherous Trio is complete. They gather with Meredith in the place where most people welcoming their guests congregate, the kitchen.  They may even munch on some mushrooms.

At some point, whatever has been worked out with Guede ahead of time is initiated.  What some might regard as BDSM, others, like me, consider more along the lines of aggregated sexual assault and battery with a deadly weapon. 

Knox retrieves the kitchen knife from the drawer.  She uses it as an extremely threatening weapon, to intimidate Meredith.  Sollecito and Guede physically restrain her while Guede sexually assaults her.  Possibly Knox directs Sollecito to physically assault her with the small knife to make her be more compliant.

Meredith is anything but compliant, fights back, and pleads with them. 

This leads to the jackknife wounds to her neck and eventually to her being strangled.  Meredith Kercher does not go gently into that good night.  She fights her way back up to her feet, and she screams. 

This perhaps is when Knox delivers the fatal blow to her neck with the kitchen knife, to stop her screaming and getting away to seek help.

They then drag her to her room and lock the door.  At this point, Guede grabs some toilet paper to clean the blood off himself, and they flee.  Rudy goes dancing, and the Deadly Duo go to the park till the way is clear for a clean-up.

Knox and Sollecito return after the broken-down car is removed, arrange the bedroom leaving the bra clasp, stage the break-in, and clean the rooms where they had been.  They have not been in the bedroom very much so this is left pretty much alone. 

They cleanse the kitchen of all DNA and fingerprints and perhaps bring more bleach when the Conad store opens in the morning.

Until Amanda Knox pulls the kitchen knife from the drawer, each of them, Guede, Sollecito, and Knox are acting as individuals with their consciences and moral upbringing intact.

When the knife comes out, they become something else, and the group becomes responsible for what happens, not each themselves.

Is it possible that the reason they are being so tight-lipped is that if any one of them identifies the other’s actions, then that person would have to accept responsibility for what he or she also actually did do? 

Does it stay a group action only if the group remains intact?


Wednesday, April 22, 2009

Understanding Why The DNA Is On The Knife

Posted by Peter Quennell

[click for larger image]




Our DNA poster Nicki has been careful not to exaggerate the impact as evidence of the DNA on the knife found in Sollecito’s apartment.

She accepts that in the eyes of the court there could be question marks over the size of the sample and the fact that the tests could not be repeated.

However, as the knife appeared to have been thoroughly cleaned with bleach, some remain intrigued that any DNA at all was found.

Here is a short piece explaining why. This article by Juliet Lapidos was posted on the Slate site in November 2007. But we haven’t seen better, and it is still often referred to.

Slate 20 Nov 2007
How To Clean a Bloody Knife: Does DNA come off with soap and water?
By Juliet Lapidos NYTimes Staff Writer

Investigators in Perugia, Italy, have found new evidence linking a 20-year-old American exchange student, Amanda Knox, to the brutal stabbing death of her roommate, British student Meredith Kercher. According to the latest reports, Knox and her Italian boyfriend, Raphael Sollecito, cleaned the alleged murder weapon””an 8-inch black-handled kitchen knife””with bleach. Nevertheless, police discovered Kercher’s DNA on the tip and Knox’s DNA by the handle. Is it possible to clean DNA off a knife?

Yes, if you know what you’re doing. Knox and Sollecito were on the right track: Bleach contains sodium hypochlorite, an extremely corrosive chemical that can break the hydrogen bonds between DNA base pairs and thus degrade or “denature” a DNA sample. In fact, bleach is so effective that crime labs use a 10 percent solution (one part commercial bleach to nine parts water) to clean workspaces (PDF) so that old samples don’t contaminate fresh evidence. Likewise, when examining ancient skeletal remains (PDF), researchers first douse the remains in diluted bleach to eliminate modern DNA from the surface of bones or teeth.
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So, why did Knox and Sollecito’s bleaching gambit fail? It’s difficult to swab a knife thoroughly. Dried blood can stick to the nooks and crannies in a wood handle, to the serrated edge of a blade, or become lodged in the slit between the blade and the hilt. With help from a Q-tip, it’s possible to eliminate most stains, but what’s not visible to the naked eye might still be visible to a microscope, and sophisticated crime labs need only about 10 cells to build a DNA profile.

Bleach is perhaps the most effective DNA-remover (though evidently no methodology is failsafe), but it’s not the only option. Deoxyribonuclease enzymes, available at biological supply houses, and certain harsh chemicals, like hydrochloric acid, also degrade DNA strands. It’s even possible to wipe a knife clean of DNA-laden hair follicles, saliva, and white blood cells with generic soap and warm water. The drawback to this last method is that the tell-tale cells don’t just disappear once off the knife. They linger on sponges, in drains, and even in sink traps, where wily investigators search for trace evidence.

There appears to be a great deal more DNA evidence than merely what is on the knife, of course, and early in the trial the known luminol-evidence universe also expanded.

The court was told that AK-sized and RS-sized footprints appeared under luminol on the floor of Filomena’s room.

Nicki’s two Powerpoints on the DNA can be seen here and here and Kermit’s Powerpoint (pre the new evidence) on the luminol can be seen here.


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