A number of independent experts have already confirmed the validity of the DNA evidence at various court hearings.
There was an independent review of the forensic evidence in 2008.
Dr. Renato Biondo, the head of the DNA unit of the scientific police, reviewed
Dr. Stefanoni’s investigation and the forensic findings. He testified at Rudy Guede’s fast track trial in October 2008 and confirmed that all the forensic findings were accurate and reliable.
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Alberto Intini, the head of the Italian police forensic science unit, testified for the prosecution at the trial last year. He maintained that the crime scene had not been contaminated. He pointed out that unless contamination has been proved, it does not exist.
He also stated that the results of the tests showed that the investigation had been carried out correctly because there was not even one trace of any of the forensic technicians.
The Kercher family hired their own DNA expert,
Professor Francesca Torricelli, and asked her to examine the DNA evidence.
Professor Torricelli is the Director of a genetic facility at Careggi University Hospital and has been working in genetics since 1976. She testified at Knox’s and Sollecito’s trial last year and she also confirmed Dr. Stefanoni’s findings.
She told the court that the significant amount of Sollecito’s DNA on Meredith’s bra clasp meant that it was unlikely that it was left by contamination. ...
Distinguished DNA expert and former Caribinieri
General Luciano Garofano analysed the DNA and forensic evidence for the early 2010 book “Darkness Descending”.
He has more than 32 years of forensics experience and is a member of the American Academy of Forensic Sciences. He is considered by many as Italy’s top forensics expert. In his section of the book, he explains at length why he too thinks that Knox and Sollecito are guilty of Meredith’s murder.
Although General Garofano agrees with Dr. Renato Biondo and Alberto Intini that the scientific police did a good job, he thinks the police should have separated the plastic handle from the knife and checked for blood there because it often gathers in the grooves and recesses under the blade.
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http://www.truejustice.org/ee/index.php?/tjmk/C348/