Obviously the state of Florida said there is nothing credible so there is nothing to go on.
Well, then of course you have the cover-up to deal with. Now, the cover-up itself doesn't mean he was guilty, but it did all but insure the case couldn't be handled properly. It also does raise a lot of questions... a lot.
From what I understand she was discouraged from pursuing this once the cops knew who he was (which of course should have had no bearing at all). Even repeated attempts on her part to get them to take action fell on deaf ears until the media was made aware of this story. They didn't even bring Winston in for questioning! They didn't even test him to see if it was his DNA, they did nothing at all a proper police department would have done.
We also know that information was leaked to Winston and his roommates. Now, just dwell on that part. If there was nothing to it, there wouldn't have even been a need to tip them off, but they were tipped off! They were made aware prior to any questioning, which goes against the cardinal rule of police investigation. Just that one aspect in and of itself raises massive questions about police conduct in the case and Winston's guilt.
There is no question, no question at all that the police impeded this case and didn't want it to go further. Despite that, there was still tangible proof that something was amiss. A woman came in and she'd just been raped. The rape was almost immediately reported. She didn't know who her attacker was, she had bruises on her. No need to go any further, how often are false accusations made against people the alleged victim couldn't even identify? What would the point of that even be?
Now, the only real weak point of the entire case from what I've read, aside from the police sabotaging it deliberately, would come from two things.
A: It appears she had sex with her boyfriend that day. I know, slut! Sluts can't be raped right?
B: She seems to have some sort of issues with her memory. I still can't figure out how that makes it not rape either. If a woman is incapacitated in anyway, be it drunk, high, or just having suffered a blow to the head, it actually makes it harder for her to legally consent, not easier. So if anything it seems to strengthen the case that she was raped. Failure to explain how or why this occurred is irrelevant, she was aware enough (if she wasn't aware then it would have had to have been rape) though to know she was raped.
This was an intentionally botched investigation that wasn't even an investigation until the media found out about this. I've read a lot of reports, I've absorbed the information, and I haven't seen a single thing, one tiny little piece of evidence that exonerates Winston. However, I've seen just piles of things that point towards it being rape.
And as to the no proof thing... what do some people want? For it to be in video? Oh wait! It was recorded, but since they were tipped off they were able to delete it (unrecoverable... of course...)! I mean you make sure to delete all recordings of consensual sex before the cops can see it right? The fact is
if that video showed a woman having obviously consensual sex, the lawyer never would have let them delete it.