Fallen Star/Pacific Coast News

Former "Prison Break" actor Lane Garrison was arrested Sunday at his Beverly Hills apartment on suspicion of domestic violence, according to TMZ.com. The alleged incident reportedly involves Garrison's ex-girlfriend, Ashley Mattingly.

Garrison's lawyer tells TMZ that he's innocent.

Police previously went to Garrison's apartment on Saturday after receiving a domestic violence call, but he was not there at the time. Garrison was being held on $50,000 bail as of Sunday night, however his lawyer Harland Braun tells the gossip site his client "decided to stay" in jail overnight, so he can tell his side of the story to detectives as soon as possible Monday morning.

Braun insists Garrison showed up at his ex's building to walk his acting coach's dog: the associate lives in the same building as Mattingly, who Braun says got violent. Braun tells TMZ he thinks Mattingly deliberately got Garrison arrested, because he was just six days from ending his probation.

Earlier this year, Garrison reportedly was at the center of a domestic violence complaint that did not lead to an arrest.

Garrison spent 18 months in prison for DUI and vehicular manslaughter in connection with a fatal car crash.