A statement released by the university said a “single shot was fired on campus toward a visiting speaker. Police are investigating now, suspect in custody.” A university spokeswoman later told the New York Times that police had determined the person detained earlier was not the shooter, and that no suspect was currently in custody.

Looks like the guy initially arrested turned out to not be involved (maybe just another guy with a high powered rifle? Don’t know, must make things hard in the US). Or have they since arrested someone else?