snip If evidence that he was there is all you want, it should be easy to collect. Since so many of the alleged assault happened AT HIS HOUSE, I think it stands to reason BC was present during the time of the alleged attacks.
I think it's much to late to gather some kinds of physical evidence from his house--ten or twenty years of laundry, time to throw away anything incriminating, repaint walls and polish bannisters, so fingerprints, hair on cushions, body fluids on sheets, etc. would have disappeared by now. None of that, though, would prove consent or lack of consent though it would prove the presence of someone. I guess that would be helpful if BC was claiming that person was never there and the evidence suggested she was there contradicting his story. However, I think it would be much harder now to find physical evidence that could prove that an alleged victim had been drugged by BC rather than bringing the drugs herself, or that the alleged victim drank too much of her own volition and had never been given drugs.
There might be witnesses to someone's arrival at/departure from the house--like a cook, chauffeur, housekeeper, security staff member (in fact, I would have thought that someone of his standing should have had around the clock bodyguards), someone in his entourage. There might be neighbours who would have heard or seen something unusual. There might be a journal kept by security as a reference so shift changes would be informed of how many people were in the house at any particular time, it's possible that those kinds of records might be kept by the chief of security when dealing with a celebrity. There might have been CCTV security, but it's not too likely, IMO, that such records would have been archived since they tend to be taped over.
There might be people who would testify that the alleged victims told them about the incidents. Certainly, police reports would have been archived. There is the testimony of Frank Scotti who still has the receipts from his role in keeping BC's presumed sexual partners quiet. He can back up that he gave people money on behalf of BC, but I don't think he can say all of them were mistresses.
...ex-NBC employee Frank Scotti alleges that he was appointed the position of “royal fixer.” In this role, he stood guard outside of Cosby’s dressing room when the latter invited young models over, arranged deals to buy apartments for supposed mistresses, and sent sums of up to $2,000 to various women under Cosbys…ahem…employ. The requests got so bad and so upsetting that Scotti ended up quitting his job at NBC. He said of his situation,“It bothered me. . . . You’ve got all of these kids, every time. I used to like him, but that’s the reason I quit him after so many years — because of the girls.”
http://www.crushable.com/2014/11/24...-paid-off-women-for-sex-favors/#ixzz3R7fsjKMU
IMO, it's possible that, if BC was guilty of the alleged crimes, he might have taken "trophies" or "souvenirs" that LE could tie to the alleged victims, or photographs of his unconscious alleged victims, or he could have made audio tapes of his attacks, and then kept these things in some kind of cache that he could revisit. I don't know how likely it would be that he would still have these around, although, if he does, I would bet that someone very familiar with his activities, like a bodyguard, might have a very good idea of where such a stash could be hidden.
Are these the kinds of things you were thinking of, Nova?