the knife's going to be tossed out, isn't it?
Even if they give the prosecution allowance on the knife, there was some pico-spec of DNA before and now its missing, it wasn't from a bloody knife used in a murder.
Knife wasn't cleaned, there's no blood, and the retesting even in other areas of the knife, by the neutral experts, came up with nothing....er.except Starch.
For me, what little I know about the DNA tool, the magnified DNA of the knife is possibly tool-contamination, residual very faint garbage/noise the tool sees. Thats how I see it. Tool residue, in that tiny capillary tube, is why controls and purges are to be done everytime, in addition to ignoring the "garbage" range of rfu values. Contamination from the tube, I read, can produce the low RFU range peaks.
Then there are no controls to see the machine was clean.
Anyway, the RFU values are so low they should never have been allowed. (I find this very dishonest, they changed the Y Axis on the chart to make the 20rfu peak look the same size as a 1200 peak. and then to show it to untrained jurors....very dishonest. I know its legally ok and all the scientists understand these details, but for a layjudge I wonder how well they explained ti for them.)
This was an interesting interview from someone inside the courtroom.
http://www.westseattleherald.com/2011/07/30/news/update-2-final-hearing-amanda-knox-today-not-so-f
"Comodi asked the experts how can they prove there is contamination (on the DNA from the collected evidence) and the experts said the standard process is you have negative controls in place to disprove the testing machinery, and the machinery gave a positive reading for contamination."
Mellas explained that Comodi countered that details proving the prosecution's original DNA results were in the case files and should be discussed in court, and that she had access to the files.
"The judge said, 'OK. There will be a 30 minute recess to find those files'. When court resumed Comodi said the files could not be found. The judge said, 'You've been shown to not be forthcoming, and honestly, it wouldn't change the outcome because we now have their report so I won't allow it (in the future.)