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We know this much about Oklahoma running back Joe Mixon: He's sorry for punching punching Amelia Molitor in a restaurant two years ago, and he takes full responsibility for what happened.

"It doesn't matter what she did," Mixon said during a Friday press conference. "It's all on me. I'm the reason why I'm in this position."

This wasn't the first time Mixon made a media appearance since the incident in July 2014, but it was the first time he made an extended effort to talk about it -- likely because there were no lawyers to enforce otherwise. He also admitted for the first time that the entire incident was his responsibility as opposed to previous apologies in which his lawyers often tried to provide some reason for his punch, such as Molitor initiating the physical contact or a racial slur being thrown.

Mixon did not make any such excuses on Friday.

"I'm here to basically apologize to Ms. Molitor," Mixon said. "I apologize to Coach [Bob] Stoops. I apologize to President [David] Boren, the AD [Joe Castiglione], my teammates and most of all my family. I let a lot of people down."

Mixon added that he wished the videotape, which was released earlier this month following a long legal battle between the Oklahoma Association of Broadcasters and the City of Norman, had come out sooner. That video was soon followed by another of Mixon's interrogation in which the running back said it "felt like a dude" hit him when Molitor slapped him.

"Everyday I gotta live with it, gotta sleep with it," he said. "It haunts me to this day. If I could take it all back I would."

For punching Molitor, Mixon was charged with a misdemeanor and placed on probation. He was ordered to complete 100 hours of community service and counseling, which he has continued to this day. Mixon was suspended for the 2014 season though allowed by Stoops and Oklahoma's administration to remain on the team. When asked about that punishment this week, Stoops admitted that these days that simply "wasn't enough."

"One day I hope I can apologize to her face to face and ask for her forgiveness," Mixon said, adding that he hasn't been able to because he was advised against it. Mixon also noted he was willing to speak with domestic violence groups and to children, noting it was "never OK" to hit a woman.

As for Mixon's next step, it's not clear yet whether he will return to Oklahoma for another season or enter the NFL draft.

"I'm not worried about the NFL right now. I'm totally right now committed to the team," he said. "I haven't made a decision. I'm focused on January 2nd -- beating Auburn."

Mixon led Oklahoma with 1,183 rushing yards in 2016.