Barron Hilton, 18, was stopped after a witness reported seeing a black Mercedes-Benz weaving on the Pacific Coast Highway, at times drifting into the oncoming lane, according to the Los Angeles County Sheriff's Department.

Deputies arrested Hilton after he pulled over and got out of the car. He was booked in Malibu, where he registered a blood-alcohol level of 0.14 percent, authorities said. The legal limit in California is 0.08 percent.

He had a female passenger in the vehicle who had apparently been driving earlier and might have been involved in an accident, the Sheriff's Department said. She was not identified, and a call to the California Highway Patrol, which was investigating the woman's role, was not immediately returned.