The Left Handed Gun (1958)

William Bonney - Billy the Kid - gets a job with a cattleman known as 'The Englishman,' and is befriended by the peaceful, religious man. But when a crooked sheriff and his men murder the Englishman because he plans to supply the local Army fort with his beef, Billy decides to avenge the death by killing the four men responsible, throwing the lives of everyone around him - Tom and Charlie, two hands he worked with; Pat Garrett, who is about to be married; and the kindly Mexican couple who take him in when he's in trouble - into turmoil, and endangering the General Amnesty set up by Governor Wallace to bring peace to the New Mexico Territory.