The Hawk of Powder River (1948)

Vivian Chambers (Jennifer Holt) has a secret identity. She moonlights as "the Hawk," a villain who leads a gang of criminals. Vivian's uncle owns a ranch, and she wants to commandeer it. After her uncle catches a glimpse of the Hawk's secret lair, Vivian kills him and decides to go after his daughter, Carole (June Carlson), as well. Now it's up to Deputy Marshal Eddie Dean (Eddie Dean) to save Carole and defeat Vivian and her bandit minions.