The Doolins of Oklahoma (1949)

When the Daltons are killed at Coffeyville, gang member Bill Doolin arriving late escapes but kills a man. Now wanted for murder, he becomes the leader of the Doolin gang. He eventually leaves the gang and tries to start a new life under a new name. But the old gang members appear and his true identity becomes known. So once again he becomes an outlaw trying to escape from the law.