CHARLOTTESVILLE, Va. -

A four-month police investigation into an alleged gang rape at the University of Virginia that

Rolling Stone

magazine described in graphic detail produced no evidence of the attack and was stymied by the accuser's unwillingness to cooperate, authorities said yesterday.

The article, titled "A rape on campus," focused on a student identified only as "Jackie" who said she was raped at the Phi Kappa Psi fraternity more than two years earlier.

It described a hidden culture of sexual violence fueled by binge drinking at the college. Police said they found no evidence of that either.

There were numerous discrepancies between the article, published in November, and what investigators found, said Charlottesville Police Chief Timothy Longo, who took care not to accuse Jackie of lying.

The case is suspended, not closed, and the fact that investigators could not find evidence years later "doesn't mean that something terrible didn't happen to Jackie," Longo said.

He appealed for anyone with information about any sexual violence to immediately alert police, and expressed hope that Jackie may one day feel comfortable explaining what really happened.

Asked if Jackie would be charged with making a false report, he said: "Absolutely not."

Jackie's attorney, Palma Pustilnik, said she would have no comment on the investigation.