Bad Men of the Border (1945)

U. S. Marshal Ted Cameron (Kirby Grant), masquerading as a bandit, robs a mail coach. Delores Mendoza (Armida), a passenger, is an agent for the Mexican government, assigned to investigate a counterfeiting and smuggling gang operating below the border. She joins forces with Ted and his sidekick, Rockabye Jones (Fuzzy Knight), and together they expose the gang and bring them to justice.