As in how does one prove he did not rape a woman? Sure there is: a complete lack of physical evidence and a dearth of circumstantial evidence would prove that no rape occurred. That's what's so perplexing to me about this story: if, as the story claims, there was absolutely no physical evidence whatsoever that a rape took place, why (1) did the cops believe the woman's story, and (2) the prosecutor agree to take on the case?