The Fargo Kid (1940)

In this light comedy, the Fargo Kid rides into town on an outlaw's horse and when mistaken for him, is hired to kill a man. There is a reward for the outlaw and the Kid's pal Whoppper not realizing what has happened, alerts the Sheriff in hope of earning the reward. Thinking himself a good judge of character he even enlists the outlaw's help in the capture.