Business INsider reports A 32-year-old man was shot dead by an off-duty police officer at a branch of Costco in Corona, California, on Friday.

In interviews since the attack, the cousin of the slain man, Kenneth French, said he was mentally disabled and called him a "gentle giant."

Police say French launched an unprovoked attack on an off-duty LAPD officer, who shot him dead during the confrontation.

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