See the bizarre story here. At least a few reports find no indication that intoxicating drugs were involved. Here's an excerpt:
The secretary was driving alone in a Lexus on a major street in San Gabriel when he struck the rear end of a vehicle that had been stopped for a passing train, authorities said.
Bryson spoke briefly with the occupants and then hit their car again as he departed, the officials said. The three occupants followed Bryson while calling police.
Bryson was cited for the hit-and-run, although he has not been formally charged.
Bryson then caused a second collision minutes later in the nearby city of Rosemead, striking a car occupied by a man and a woman, authorities said. Bryson was found alone and unconscious in his car.