Drunk or not, fighting off someone(s) who are having sex with you, is rape. Two DNA samples means nothing, it could just be two rapists. The real deal breaker is physical evidence in herself... is there any evidence that she fought back? If not, they probably won't charge. That doesn't mean Winston didn't rape her, it just means that there isn't clear evidence of it. If a woman says "no" just once, and doesn't say anything else, it's still rape. If she's drunk, and can't make clear decisions, it's rape. Most rapists get away with it, because it's very hard to actually make a clear case, and that's even if the victim comes forward.