I was of course aiming at a lab contamination scenario. But considering a hypothesis that the DNA really was on the knife I'd say it's by far more probable it got there by transfer, than that it got there by stabbing and then survived a vigorous cleaning.
We shall have to agree to disagree.
Actually he was the last person that spent considerable time there. The day before he was there with Amanda while the Italian girls were away.
I don't see that it being the day before overwhelms the time they spent in the apartment preceding that.
On Nov 2 he was in every room and was trying to get into Meredith's room.
True. As were the police, and Filomina's boyfriend I think. In any case, he never entered Meredith's room.
Amanda also inevitably was transferring his DNA day by day.
In teeny, tiny quantities though. She would have been transferring hugely greater quantities of her own DNA.
Even on Nov 2 when she came home to take a shower in the morning.
I don't see how that is significant.
Just an arbitrary number large enough that I know I wouldn't sleep after convicting someone with such a probability of mistake.
But this is only one piece of evidence. As has been discussed before, you could be 99% sure of guilt, but have relatively low levels of certainty about individual pieces of the evidence, even below 50% certainty.
Incidentally, no matter how little probability you would see of an "innocent" transfer, such a transfer is fully consistent with the complete lack of other incriminating traces.
Being consistent with something you don't think happened doesn't mean a lot.
And what are the chances that in a violent struggle, in which he was holding down and stabbing a victim squirting blood, he was struggling with her bra presumably to take sexual advantage of her and he left only one trace of incomlete DNA of LCN ammount?
That's only one way the DNA could have gotten there with Raffaele still being involved in the murder. The bra clasp was removed at some point after all.
And of all the possible places where he could have left abundant DNA, footprints, hairs, fingerprints his single trace of DNA landed on a hook of a bra clasp? I would expect his DNA on the bra straps, on victim's body where he held her, even inside her body.
Depends what he did, doesn't it? Rudy supposedly did a heck of a lot, and sure there was DNA and fingerprints, but it's not like they were gathering them up by the bucketful. Raffaele and Amanda, if they were involved, presumably were less physically involved than Rudy.
At least some of his footprints on the floor.
I'm not going to touch a discussion about footprints.
BTW Again all of our chance considerations disregard the non-zero probability that the DNA was simply planted.
True, that's a different scenario with other problems. Are we talking about the police, the prosecutor, and the lab working alone, or together to frame them here?