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The working titles of this film were Decision at Durango, Law of the Trigger and Point of Decision. Although the onscreen credits and contemporary sources state that the film was based on a story by John M. Cunningham, which the SAB identifies as "Raiders Die Hard," the film was to be based on the 1956 Clifton Adams novel Law of the Trigger. A March 1957 "Rambling Reporter" item in Hollywood Reporter noted that Joy Page was being considered to star in Day of the Bad Man, but she does not appear in the film. Although March 1957 Hollywood Reporter news items include Edwin Parker and Kenneth MacDonald in the cast, their appearance in the final film has not been confirmed.