Mixon has not been charged with any crimes. But an Oklahoma female student claims Mixon punched her, breaking four bones in her face.
Kevin Finlay, an attorney representing Mixon, has maintained his did nothing wrong in the incident and released the following statement Monday.
"This past Friday morning Joe Mixon found himself in a situation where he was subjected to both verbal and physical attacks from a very intoxicated and troubled young woman. As a result of these physical attacks, Joe instinctually defended himself against further harm.
"As promised, Joe met with investigators from the Norman Police Department this afternoon. Throughout the meeting, Joe continued to be forthcoming and cooperative with their investigation.
"We are looking forward to a thorough investigation and are very much looking forward to the truth coming out. As we have always maintained, Joe has done nothing wrong."
The alleged incident occurred at Pickleman's Gourmet Cafe about 2:40 a.m. Friday. According to the incident report, Amelia Rae Molitor, a 20-year-old Oklahoma student from Euless, Texas, told police that Mixon had been "harassing" her and her friends.
"He punched me one time," she said in an interview with The Oklahoman newspaper. "He broke my face in four places ... my nose, my sinuses ... they're broken."
Norman police released a statement Monday confirming Mixon's involvement at the scene, and that it had video of the incident.
Mixon was the top signee in Oklahoma's most recent recruiting class. The Oakley, Calif., native was rated the No. 6 running back recruit in the country. Before the alleged incident, Oklahoma coach Bob Stoops said in an ESPN radio interview on The Herd With Colin Cowherd that Mixon would have a chance to start.
"Oh, absolutely, he'll have a chance to," Stoops said. "We've got other talented guys, but Joe, he's been everything we hoped he would be on campus already."
An Oklahoma spokesman has said the university is conducting its own internal investigation into what happened.