Billy the Kid in Devil Riders - Buster Crabbe

1943 directed by Sam Newfield and starring Buster Crabbe and his horse, Falcon, and in lesser roles: Al St. John, Patti McCarty, Charles King, John Merton, Kermit Maynard,
A seedy lawyer and his gang of villainous henchmen conspire to steal a stretch of government land that is intended for a stagecoach company. Billy gets hired to route the villains because the U.S. Government obviously doesn’t have the agents who can handle something like that.