The Left Handed Gun

The Left Handed Gun is a 1958 American western film and the film directorial debut of Arthur Penn, starring Paul Newman as Billy the Kid and John Dehner as Pat Garrett.

Drifter William Bonney Paul Newman, known as Billy the Kid, befriends a cattle boss named John Tunstall, who is known as The Englishman. Tunstall is murdered by corrupt rival cattlemen led by the local sheriff in the Lincoln County War. Bonney plans to avenge the crime by hunting down those responsible and killing them in provoked gunfights. His violent actions endanger his surviving friends and the territorial amnesty proclaimed by New Mexico Territory governor Lew Wallace. Billys former friend, Pat Garrett, becomes a sheriff and sets out to hunt him down.Billys worshipful companion, Moultrie, lionizes Billys actions, fueling a series of dime novels that transform Bonney into a legend. Billy is disgusted with his fictionalization, and he rejects Moultrie. Embittered, Moultrie betrays Bonney to Garrett. In a final showdown, Garrett ambushes and kills the exhausted Bonney, who faces his nemesis unarmed in the hopes of ending his own life. ........

Source: Wikipedia