Rancho Notorious

Rancho Notorious is a 1952 Western film shot in Technicolor, directed by Fritz Lang and starring Marlene Dietrich as the matron of a criminal hideout called ChuckaLuck. Arthur Kennedy and Mel Ferrer play rivals for her attention in this tale of frontier revenge.

Wyoming ranch hand Vern Haskell is enraged when his fiancee Beth Forbes is abused and murdered during a store robbery. He sets out after the two thieves, first with a posse, then by himself. He finds one of them, Whitey, shot in the back by his partner after a quarrel. Whiteys dying words, Chuckaluck, are the only clue to the second mans identity.After questioning everyone he meets, Vern finally finds someone who lets slip that a woman named Altar Keane is connected with Chuckaluck. When the man realizes that Vern is just fishing for information, Vern is forced to kill him in selfdefense. Vern is taken into custody, then released when the dead man is identified as a wanted outlaw. By a stroke of luck, a deputy knows Altar as a saloon singer from his past, though not her current whereabouts. ........

Source: Wikipedia