Former Melrose Place and T.J. Hooker babe Heather Locklear's troubles continue. Two months after completing a four week stint in an Arizona treatment center for "anxiety and depression," Locklear was arrested and held in police custody last night in Santa Barbara on suspicion of driving while impaired. Police sources say that alcohol wasn't involved but that tests are being conducted to determine if the actress was on drugs. She was released on her own recognizance. [TMZ] Update: Mugshot goodness after the jump.