He was playing poker in a Deadwood saloon when he was shot dead by Jack McCall in 1876
[DOC] [TLE] Jack McCall - Wikipedia [PAR] John "Jack" McCall also known as "Crooked Nose Jack" or "Broken Nose Jack", 
was the murderer of Old West legend Wild Bill Hickok, shooting him from behind 
while he played poker at Nuttal & Mann's Saloon in Deadwood, Dakota Territory 
on August 2, 1876.