Locklear, who is no longer in custody, was arrested by the California Highway Patrol and booked about 7 p.m. after a citizen called 911 to report a woman's erratic driving, said Tom Marshall, a spokesman for the CHP. The person who reported the incident said she saw a woman who was visibly impaired, later identified to be Locklear, getting into a car in a Montecito parking lot Saturday afternoon about 4:30, Marshall said.

Locklear showed bizarre behavior, driving back and forth over a pair of sunglasses on the pavement and revving her engine. After leaving the parking lot, she stopped her car on the street and stumbled into the traffic lane, according to the caller, who followed Locklear out of concern, Marshall said.

When the CHP officer arrived, Locklear's car was parked on State Route 192 partially blocking a lane, Marshall said. The officer talked to her and determined that she was disoriented and "under the influence of something." She was taken to the CHP's Santa Barbara-area office to be tested for alcohol and drugs. Locklear tested negative for alcohol. Other drug tests will be returned in a few days, Marshall said.