John Wayne - A Man Betrayed [1941]

Country lawyer Lynn Hollister comes to the city to investigate the murder of a friend found shot after spending the evening in The Inferno, a night club that fronts for an illicit gambling operation. It is covertly run by an affable but corrupt politician, 'Boss' Tom Cameron, who uses voter fraud to maintain influence on city hall and the governor's mansion. Hollister learns that his friend was a winner in a dice game on the night of the murder and threatened exposure of Cameron's vice racket. Complications arise when other underworld forces vie to take over Cameron's operation, and Holister falls in love with Cameron's beautiful daughter.