On Aug. 2, 1876 at the age of 39 Wild Bill Hickok, James Butler Hickok, was playing poker at Saloon, Nuttal & Mann's (#10) Deadwood. The Black Hills of Deadwood. Hickok usually sat with his back to the wall. The only seat available when he joined the poker game was a chair with his back to the door. He asked another player twice to change seats with no success. Jack McCall entered the saloon at 4:15 p.m & drew his pistol, shouted "damn you, take that" as he shot Hickok in the back of the head. Wild Bill died instantly with his Smith & Wesson revolver in his holster, never having seen his murderer. McCall tried to shoot others in the crowd but all the remaining cartridges were duds. Hickok's hand was later called, Deadman's Hand. His hand was a pair of aces & black eights. In 1979 Hickok was inducted into the Poker Hall of Fame.

Source:

Wikipedia

www.biography.com

More Info: en.wikipedia.org