Police continued the search for an armed shoplifter who store employees said brandished a knife and stole meat Tuesday before running to the parking lot and entering a vehicle in which a girl, 13, and an older man were sitting.
As the car drove away, witnesses said, the driver was heard to say, "I don't know who this person is."
Surveillance video suggested the occupants of the car did not know the man who entered the vehicle, police said. The car and the occupants have not been seen since.
Police said they are seeking Roy McCamey, 54, as a person of interest. His name was mentioned as police searched the area, police spokeswoman Johnna Watson said. She added McCamey was known to be in the area and has a history of theft.
Authorities say unanswered questions about the incident remain, and are concerned no one has reported the occupants of the car missing, the Contra Costa Times said.