Saturday, May 23, 2009

Trial: The Seattle PI’s Report On Saturday’s Forensic Testimony

Posted by Peter Quennell


Click above for Andrea Vogt’s report.

1) On the mixed-blood traces found in a bathroom and bedroom

In the courtroom… an unflappable Stefanoni said she thought it would have been “strange” that three traces of blood with both Kercher and Knox’s genetic profile would have been left at different times.

The mixed blood traces were identified on the sink, on the bidet near the drain and on a box of Q-tips sitting on the sink.

“Fortunately these were found all on white surfaces, perhaps had the sink not been white ceramic or the transparent cotton box been a different color—pink for example—we might not have found anything with the naked eye because the traces were so diluted.”

2) On the collection methods used for one sample

Knox’s attorney, Carlo Dalla Vedova of Rome, questioned Stefanoni about the methods used by a colleague from Perugia’s local forensic division, who took samples from two different places in the bidet with the same cotton swab.

Stefanoni said the two traces seen sampling in the video were actually one continuous trace, linked by a very light-colored drip that extended from the top to the drain. Had there been any contamination or DNA of another person present, she added, it would have been revealed during the genetic analysis of the sample.

“In any hypothetical, accidental case of contamination by whomever or wherever, once we do the analysis and see the genetic profile, we can see that there has been contamination from another person. There would be problems apparent in the data analysis,” she responded.

3) On the DNA on the knife found in Sollecito’s apartment

Friday Stefanoni said she was able to identify the genetic profile of Knox on the handle of the large kitchen knife that is the alleged murder weapon, and that of Kercher on the blade. The sample of Kercher’s DNA was so small, only one identifying test was performed, however, and could not be repeated for verification. Still, Stefanoni insisted that the one test that was conducted produced a reliable result.

 

Posted by Peter Quennell on 05/23/09 at 10:17 PM in Evidence & Witnesses,  DNA and luminol,  Trials 2008 & 2009

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