The Moonlighter (1953)

Wes Anderson Fred MacMurray is caught cattle rustling and promptly jailed The public is outraged but since Wes always worked at night they dont know what he looks like Still they break into the prison and lynch a hobo they think is Wes while the actual culprit sneaks off to see his old flame Rela Barbara Stanwyck who has recently taken up with his straitlaced brother Tom William Ching But Tom is envious of his outlaw brother and he decides to join Wes in a life of crime