Frontier Outlaws - Billy the Kid

1944 directed by Sam Newfield starring Buster Crabbe, Al St. John, Frances Gladwin, (in the girl part) Marin Sais, Charles King and Jack Ingram, and also Falcon the Horse in the part of the Horse. While looking for rustlers, Billy kills a guy in a gunfight and gets thrown in jail. The judge finds him to be innocent but keeps him in jail anyways because, what the hell. But when the rustling continues Billy get released to look for the bad guys.