Oklahoma Justice (1951)

"When law breaks out of killer country...Johnny moves in with both guns flashing!"

Johnny Mack Brown goes up against a lady bank robber in this average Mack Brown series late-entry from Monogram. The lady, played by Barbara Allen, is of course called "Ma." In order to get the goods on "Ma" and her "brood," Mack Brown must masquerade as a lone bandit.