So Chris is a 'Halide' now?
Sure 'anything is possible'. However, Massei and Nencini (the
merits, fact-finding courts which
analyses all of the evidence in fine detail from all parties, in a public trial seen to be fair, ruled there was no evidence of contamination, the defence failed to show that this was in anyway feasible or probable. You, sitting in your armchair saying, 'There are many possible routes of contamination', doesn't negate the
fact found by a rigorous court of law
there was no contamination.
Your argument revolves around the idea that 'the police, prosecutor and forensic scientists were bent, out to frame the kids for some unspecified reason - oh yeah, they hated Americans and thought she was a witch because she slept around and took drugs.' It's as presposterous as saying the police 'fixed' some random drunk driver's breathalyser test because the whole system was intent on framing him for some perceived personal characteristic (perhaps he liked the Birdie Song). Do you see how far you have to reach to predicate your 'bent cops' premise?
Regarding olineageousness. We were discussing how DNA is only found in nucleated cells. These include sebaceous glands which are found at hair follicles and contain lipids (fats) unique to humans, which provide moisturisation of hair and skin, especially on the head and face. The olineageous substance means that if a perp has - say - combed his hair through his fingers, wiped his brow, or touched his face, his or her fingerprints are more likely to remain longer than the normal fingerprint life of <24 hours. We have confirmed there are no sebaceous glands in the fingers, thus zero olineageousness.
In the case of Raff's DNA, the bra-clasp was found under the sheet, under the body, which itself was under a duvet, which had random pieces of 'burglary' papers scattered over it. IOW the bra-clasp was beneath the body before it was placed in position, i.e., post-mortem. (The court established the bra was ripped at the back and removed after death.) Raff left his DNA on the metal clasp as of the time of the murder; in addition, he wasn't convicted of murder on DNA evidence alone, there was a whole stack of other fact-found evidence. As the forensic team were gathering evidence, the defence team were entitled to witness it, and this they did by method of cctv transmission to a van outside, where their forensic experts were watching. We can see from the video that at no time did Stefanoni touch the metal part of the fabric. So there was a speck on her latex glove, either because of a photographic fleck, or because of a trick of light or because of a speck of dirt. None of these could possibly cause Raff's near full-profile (17 alleles) of DNA to appear on the bra-clasp.
As for 'secondary' or 'tertiary' transfer from door knob to clasp, latex is not DNA friendly, as it is organic, non-porous and non-shiny.
Once again we are back in the BS realms of 'Stefanoni tried to frame Raff because, er, he was, er,
Italian, um,
middle class, er
from a respectable family, er, he came from Bari, yeah, that's it.
Regarding rubber: the conditions that apply to fingerprints, apply largely to forensic DNA. Both decay rapidly under most conditions. Here's an explanation of those conditions here:
https://www.quora.com/From-what-can-fingerprints-be-lifted-and-from-what-cant-they-be-lifted
All clear now?