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The working titles of this film were General Delivery and Federal Offense. According to New York Times review, the film was inspired by real-life criminals "Ice-Wagon" Crowley and "Killer" Cunniffe, who in 1926 held up a Elizabeth, New Jersey mail truck and killed the truck's driver. RKO borrowed Gloria Stuart from Fox for this production. Hollywood Reporter production charts add Alan Carter to the cast, but his participation in the final film has not been confirmed. Although studio production files list Ann Preston in the role of "Jane Turner," screen credits and major reviews list Judith Blake in the part. It is not known if Preston appeared in the picture as another character, or if Ann Preston was Judith Blake's previous stage name.