Tom, John Wesley Hardin was shot and killed.
From Wikipedia:
http://en.wikipedia.org/wiki/John_Wesley_HardinEl Paso lawman John Selman, Jr., arrested Hardin's friend, the widow M'Rose (also spelled Mroz), for "brandishing a gun in public." Hardin confronted Selman, and the two men had a verbal dispute. On being told of the argument, John's 58 year old father John Selman, Sr., who was a constable, approached Hardin on the afternoon of August 19, 1895 and the two men exchanged words. Later that night, Hardin went to the Acme Saloon, where he began playing dice. Shortly before midnight Selman walked in and saw Hardin with his back to him, and shot him in the back of the head, killing him instantly. As Hardin's body lay on the floor, Selman fired three more shots into him. Selman was arrested for the murder and stood trial where he claimed he had fired in self defense. A hung jury resulted in his being released on bond. However, Selman was killed in a shootout on April 6, 1896 by US Marshal George Scarborough. Selman and Scarborough had been playing cards and got into an argument. Both exited to the alley and shot it out, after which Scarborough returned alone. Scarborough was arrested for murder as no gun was found on Selman. However, just before his trial a thief was arrested and it was discovered he had Selman's gun. He stated he had seen the shooting and stolen the gun before the crowd arrived. Scarborough was then released.
On April 5, 1900, four years after he shot John Selman, Scarborough was mortally wounded in a gunfight with two robbers