RoseMontague
Published Author
These paragraphs are from a New Zealand Herald article on low copy number (LCN) DNA.
“The bogey is contamination. The very sensitivity of the technique which enables it to extract a DNA profile from the tiniest sample also makes it extremely vulnerable to contamination. Stringent measures are needed to minimise that risk.
The ESR has spent $1 million building special anti-contamination areas at its premises in Auckland, Wellington and Christchurch. Protocols are being developed for crime scenes where the LCN technique is used and for the handling of samples from collection through to courtroom.
LCN crime scenes will be divided into cold, warm and hot zones hot being the crime zone. Clothes are put on and discarded at each zone to minimise the risk of contamination.
We live in a ‘soup’ of DNA, explains ESR forensic programme manager Keith Bedford. ‘If I were to shed dandruff, massive amounts of dna could fall ... hair could carry DNA. The way I am speaking at the moment, we could probably detect DNA on this pad in front of me.’”
That is an excellent article, Chris. My favorite quote:
"LCN is not just about turning up the dial in the DNA lab, or about a tweak to the DNA system," says Bedford, "it is a reworking of the the whole process."
If you read the entire article and see what is required in terms of effort and money to set up a lab and a process for LCN DNA testing, the more you realize that Stefanoni did not invent a new process for LCN DNA testing. Instead she broke every rule, standard, and protocol possible in her "testing".
Amanda's appeal attributes a quote from her about such protocols where she indicates that such things are just recommendations, not requirements. I think she sees the only requirement is finding something that points the finger of guilt at the accused. In her mind, the end has justified the means.
After doing some research on this topic I went back and returned to Dr. Waterbury's post from March 8th of this year. It is an excellent summary of what standards Stefanoni ignored or broke in this case. Her result was presented as science and accepted as true by the judges and jury under the magic heading of DNA evidence. Instead it should have been considered as Junk Science.
http://www.sciencespheres.com/2010/03/lcn-dna-part-ii-watch-where-you-sneeze.html
