A cousin of the man shot by a policeman in a Costco Wholesale warehouse in Corona says he was a "nice giant" with a mental disability.
Corona police say Kenneth French attacked the Los Angeles Police Department officer, who was holding his young child on Friday night. The officer shot dead one Frenchman and seriously injured two others.
French cousin Rick Shureih identified the other victims as his parents, Russell and Paola French.
Shureih says the French family is looking for a lawyer.
The identity of the agent has not been revealed.
The Corona Police and the Riverside County Attorney's Office are conducting a separate investigation.