Hickok was killed in 1876, in Deadwood, Dakota Territory, during a poker game. He was shot and killed by Jack McCall, a gambler and former army scout, who had a grudge against Hickok. McCall approached Hickok from behind and shot him in the back of the head. Hickok was unarmed and died instantly.
Wild Bill's Legendary Legacy: Unlock the Secrets of Hickok's Wild West Journey