Gun Town (movie, 1946)

Indian Agent Kip Lewis arrives in Gun Town where Buckskin Sawyer is having her payroll shipments robbed by Indians. Kip and his men are ready the next time and learn the robbers are white men dressed as Indians. Kip finds Davy Sawyer's case at the scene and confronts him. When Davy accuses Talbot whom he lent it to, Talbot shoots him. But Davy names Talbot before he dies and Kip goes after him.