By Jen Heger - Breaking Celebrity News Assistant Managing Editor

Prison Break star Lane Garrison has been charged with misdemeanor battery for allegedly hitting his ex-girlfriend, Ashley Mattingly, Breaking Celebrity News is reporting.

As previously reported, Garrison, 31, was arrested last weekend for getting into a confrontation with Mattingly in the lobby of her apartment complex in Beverly Hills. The actor is being held in jail as he isn't eligible for bail because he is still on parole for a vehicular manslaughter conviction in 2007, which was supposed to end this Saturday.

The altercation was caught on surveillance video -- Garrison maintains that he didn't hit Ashley and was only trying to get his cell phone back from her. However, the investigation took an ominous turn for the actor when an unidentified witness told cops they saw the entire incident and that Lane clearly hit Ashley.

"A witness has come forward who has told the Beverly Hills Police Department they saw the incident between Ashley and Lane. The witness can't be seen on the surveillance video. This is very damaging evidence against Lane because the D.A. had been inclined to not file charges against Garrison as you can't clearly see him hit Ashley on the video," a law enforcement source tells Breaking Celebrity News. "Lane told cops that he never hit Ashley and that he was simply trying to get his cell phone back that she was holding. The surveillance video has no sound and this witness would be a very compelling witness for the prosecution."

Garrison's life took a tragic turn in 2006 when the car he was driving struck a tree and killed one of his teenage passengers. The actor pleaded guilty to the vehicular manslaughter charge and was released from state prison in 2009 after serving 20 mon