Don't shoot (1926)

Nancy Burton, niece of the sheriff, is in love with Deputy Tom Farrell, but she as an aversion to bloodshed. She overhears that he shot and killed an outlaw three years in the past. He swears to her that it never happened but she does not believe him. Later her uncle tells he that it was he who killed the outlaw, Trevis, in the line of duty. She also learns that the brother of Trevis, seeking revenge, is on his way to kill Farrell.