Jonsson told the cops that movement by a dumpster caught his eye, and he saw a guy on top of a female who was lying on her back, according to a police report.

At first, Jonsson and Arndt assumed the interaction was consensual. But Jonsson said he noticed that the female wasn't moving as he peddled by. "Something seemed weird," he told police, because the woman appeared to be unconscious.

Jonsson and Arndt approached the dumpster and yelled "Hey" to the guy who was later revealed to be Turner. He took off running, according to the police report. Jonsson realized the woman was passed out and chased after Turner, eventually catching and tripping him, the police report said.

Officers responded to a call about an unconscious female near the Kappa Alpha fraternity about 10 minutes later, according to the report, and found Jonsson and Arndt holding Turner on the ground. Witnesses told police that Turner had possibly sexually assaulted the woman who was lying next to the dumpster.