Kiss Tomorrow Goodbye (1950)

From the trial of the survivors, we flash back to amoral crook Ralph Cotter's violent prison break, assisted by Holiday Carleton, sister of another prisoner...who doesn't make it. Soon Ralph manipulates the grieving Holiday into his arms, and two crooked cops follow her into his pocket. Ralph's total lack of scruple brings him great success in a series of robberies. But his easy conquest of gullible heiress Margaret Dobson proves more dangerous to him than any crime...—Rod Crawford