In his announcement, the prosecutor, William N. Meggs, acknowledged a number of shortcomings in the police investigation. In fact, an examination by The New York Times has found that there was virtually no investigation at all, either by the police or the university.
The police did not follow the obvious leads that would have quickly identified the suspect as well as witnesses, one of whom videotaped part of the sexual encounter. After the accuser identified Mr. Winston as her assailant, the police did not even attempt to interview him for nearly two weeks and never obtained his DNA.
The detective handling the case waited two months to write his first report and then prematurely suspended his inquiry without informing the accuser. By the time the prosecutor got the case, important evidence had disappeared, including the video of the sexual act.
“They just missed all the basic fundamental stuff that you are supposed to do,” Mr. Meggs said in a recent interview. Even so, he cautioned, a better investigation might have yielded the same result.
The case has unfolded as colleges and universities across the country are facing rising criticism over how they deal with sexual assault, as well as questions about whether athletes sometimes receive preferential treatment. The Times’s examination — based on police and university records, as well as interviews with people close to the case, including lawyers and sexual assault experts — found that, in the Winston case, Florida State did little to determine what had happened.