Revenge Of The Zombies (1943)

Scott Warrington (Mauritz Hugo) and his hired detective, Larry Adams (Robert Lowery), arrive at an old mansion in the middle of a Louisiana swamp to meet his brother-in-law, Dr. Max von Altermann (John Carradine) shortly after the death of Lila (Veda Ann Borg). Max, a Nazi who has been creating zombies for the armies of the Third Reich, has turned the deceased Lila into one of the undead as well, but is surprised when she shows signs of free will and challenges Max for control over his zombie thralls. Also stars Gale Storm.