What frontier marshal was murdered in 1876 in Deadwood, South Dakota, by outlaw Jack McCall?

James Butler Hickok (May 27, 1837 – August 2, 1876)—known as "Wild Bill" Hickok—was a folk character of the American Old West. Some of his exploits as reported at the time were fiction, but his skill as a gunfighter and gambler provided the basis for his fame, along with his reputation as a lawman.

Hickok was born and raised on a farm in rural Illinois. He went west at age 18 as a fugitive from justice, first working as a stagecoach driver, then as a lawman in the frontier territories of Kansas and Nebraska. He fought (and spied) for the Union Army during the American Civil War and gained publicity after the war as a scout, marksman, actor and professional gambler. Hickok was involved in several notable shootouts.

He was shot from behind and killed while playing poker in a saloon in Deadwood, Dakota Territory (now South Dakota) by an unsuccessful gambler, Jack McCall.