I think it may be time to remind ourselves once more of Conti/Vecchiotti's damning verdict on 36B - and Stefanoni's disgustingly-incompetent testing of it (Komponisto's translation, p144, my highlighting/bolding):
Utterly damning. And entirely supported yesterday by the testimony of the Carabinieri experts.
With all due respect LJ and Chris. This is not a simple case of honest contamination and/or incompetence. It is almost assuredly a case of arrogance and corruption.
Most of us including me discuss how Stefanoni's methods are incompetent and they surely lead to contamination. But Stefanoni proved herself to be far more than sloppy and stupid.
Consider the following errors and the timing.
1. Mis-identifying the shoe prints as belonging to Raffaele.
2. Identifying a sample of DNA on the cooking blade of the cooking knife as Meredith Kercher.
3. Identifying footprints as blood despite negative tests.
4. Missing controls.
5. The bra clasp and the 46 days.
6. The passing around of the bra clasp
7. Handling the bra clasp with dirty gloves.
8. Handling the bra clasp with no gloves
9. Ignoring controls and 10 straight "too low" results.
10. Missing EDFs.
Then we should consider that Stefanoni was promoted as a result of this case.
It makes you go hmmmmmm.