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Video Allegedly Shows Lane Garrison Slapping Ex-Girlfriend

David Livingston/Getty Images for Sofitel(LOS ANGELES) -- Lane Garrison, the former Prison Break actor who was arrested on suspicion of domestic violence over the weekend, was reportedly captured on video slapping his ex-girlfriend, Ashley Mattingly. 

However, in a twist posted on TMZ early Tuesday morning, the actor reportedly told detectives the video actually exonerates him -- showing he wasn't slapping her, but trying to grab his cellphone back. has posted security camera footage that it says shows Garrison waiting outside Mattingly's Beverly Hills apartment building on Saturday.  They subsequently had an argument in and around an elevator inside the building, and it continued into the lobby.  There, Garrison reportedly grabbed Mattingly's arm and slapped her in the face.

TMZ reports that it also appears that Garrison tosses Mattingly's cellphone into the street before leaving the scene.

It's difficult to get a good look at the man's face for most of the video, in part because he is wearing a white cap.

Garrison's attorney had contended to TMZ that Garrison was at the apartment building to walk his acting coach's dog, and that Mattingly may have been intent on getting her ex arrested.

Garrison, who spent 18 months in prison for DUI and vehicular manslaughter in connection with a fatal car crash, is being held on $50,000 bail.

Speaking to TMZ on Monday, Mattingly alleged that Garrison has assaulted her in the past, including a few months ago.  She provided pictures to the website of her with marks on her body, allegedly caused by Garrison.

However, Garrison reportedly told detectives on the case that the video shows him not reaching out to strike the woman, but to grab his cellphone back from her.  He told cops she was trying to destroy evidence of "incriminating" texts she had sent to him.

Copyright 2012 ABC News Radio

ABC News Radio