Bullets for Bandits (1942)

In a saloon shooting, a cowboy thinks he killed Prince Katey, a man he closely resembles. Cannonball arrives and thinking the cowboy to be Katey, gets him to return to the Katey ranch where the mother is in trouble. She thinks her missing son has returned and even though the Sheriff is chasing him, he decides to take up the mother's fight against the man who is trying to throw her off the ranch.