A tale of two Stefs...
Carbonjam72,
The fact that the bra clasp was stored in a way that made its decay very likely is one of the more troubling aspects of the case (the PG commentariat has been very nearly silent on this point). Some time ago I viewed some of the footage of the collection of various pieces of evidence. They do a bit of playing to the camera for other things like Meredith's jacket, but not as much of a production as they make of finding the clasp. Raffaele's profile on the bra clasp was in the low template range. I grant that it is all very troubling.
Chris, Thanks for getting back to me.
I guess we're choosing between two explanations for Raf's DNA appearing on the bra clasp. The first is Dr Gill's suggestions of innocent transfer from Raf, to the door handle, to the forensic tech's glove, to the bra clasp. The second, is that Stef is intentionally inducing/interpreting a false outcome in the lab.
While the first is plausible, and may well be true. Even so, it would not eliminate the possibility that the second is also true.
If the bra clasp's destruction can not be explained through incompetence, then the question of bad faith has to be raised. Just as a failure to do a follow up TMB test on the footprints revealed by luminol would require extreme incompetence to be true, it turned out that Stef was not that incompetent - that she had done the follow up TMB tests, the results were negative, and she concealed those findings and intentionally misled the court.
Dr Gill's conjecture allows for the possibility of an innocent accidental contamination, committed in good faith, on the part of Stef and her team.
The second option does not allow good faith on Stef's part in achieving her finding of Raf's DNA on the bra clasp.
As a scientist, there's a presumption that science is actually being practiced. Observing Stef's behavior in failing to preserve the bra-clasp, hiding DNA profiles and suppressing data, concealing exculpatory confirmatory blood tests, etc, has credulity and professional courtesy been strained past the breaking point?
At the risk of being boorish, may I ask which explanation is in your view more likely: Stef honestly evaluated a contaminated bra clasp and "found" only Raf's DNA; or, Stef's evaluation of the bra clasp wasn't honest? (or both?).