Gun Law Justice (1949)

Jimmy Wakely befriends Hank Cardigan, a former outlaw who has served his sentence and wants to go straight. Jimmy, after clearing Hank of a wrongful shooting charge, helps him get a job as an express messenger. Hank drives off some bandits in an attempted hold-up, but recognizes his son Tom as one of the bandits. A later robbery is blamed on Hank, but Jimmy and his sidekick Cannonball Taylor bring in the real culprits and clear Hank's name.