File Photo.

Purdue authorities investigating sexual assault

The victim told campus police that she was walking home alone after leaving a party Saturday night when a man grabbed her and sexually assaulted her near the dining hall.

Corey Batey is seen during the Vanderbilt rape trial on Wednesday Jan. 21, 2015, in Nashville in Tenn. Brandon Vandenburg and Batey, along with two other former football players, are accused in the rape of an unconscious 21-year-old neuroscience major in a dorm room at the Nashville university. All four have pleaded not guilty. (AP Photo/The Tennessean, John Partipilo)

Vanderbilt gang-rape defense points to campus culture

The assault might have gone unnoticed and uncorroborated had the university not stumbled onto the closed-circuit TV images several days later in an unrelated attempt to learn who damaged a dormitory door.