Mississippi (1935) Bing Crosby, W. C. Fields, Joan Bennett

A young pacifist after refusing on principle to defend her sweetheart s honor and being banished in disgrace, joins a riverboat troupe as a singer, acquires a reputation as a crackshot after a saloon brawl in which the villain of the piece accidentally kills himself with his own gun, falls in love with his former fianceé s sister and finally bullies an apprehensive family into accepting him.