You see, I read the 80-ish pages of evidence. Multiple witnesses had the victim, while extremely intoxicated, inviting herself into their car as they were leaving. She is what is known as a "Cleat Chaser" - rountinely throwing herself at players. There was no accusation of drugging.
The victim put forth several contradictory stories and was reluctant to give a statement to the police. She only did after her roommate told her parents that she was very late coming home. It seems that to cover her butt (so to speak) she made up a story about being kidnapped and raped. Wouldn't want Mom and Dad to really know what she had been up to. Parents pressured her into making a report to the police. Worried that they might find Winston's DNA (after the consensual sex), she identified him as the rapist. The fact that they found her boyfriend's DNA on the same underwear speaks volumes of her habits, if not her hygiene.