Trivia

Although the story was a thinly-disguised recreation of the Nathan Leopold and Richard Loeb murder case, the legal department of 20th Century Fox was still concerned about a possible lawsuit from the still-living Leopold. A great effort was made not to mention Leopold or Loeb in the movie, press releases, and interviews. However, there was apparently poor communication with the advertising department, since when the movie came out, newspaper ads stated, "based on the famous Leopold and Loeb murder case." Leopold sued the filmmakers. He did not claim libel, slander, nor anything false nor defamatory about the film. Instead, he claimed an invasion of privacy. The court rejected his claim, in part, because Leopold had already published his own autobiography "Life Plus 99 Years," presenting essentially the same facts.

Because Orson Welles was having tax problems during the production, his entire salary for the movie was garnished several hours after principal photography was completed. This upset Welles so much that during the subsequent looping session to re-record improperly recorded dialogue, Welles suddenly stormed from the studio and left the country. All that was left to fix was twenty seconds of unclear dialogue in Welles' climactic courtroom speech, but editor William Reynolds managed to fix this problem without Welles. He took words and pieces of words that Welles had spoken earlier in the movie, and pieced them one by one into those last twenty seconds.

This is the second of four Hollywood film adaptations of the Leopold-Loeb murder case, the others being La soga (1948), Swoon (1992), and Cálculo mortal (2002).

Although he is top billed, Orson Welles (Jonathan Wilk) does not appear until 1 hour and 5 minutes into the film.

Bradford Dillman, in his autobiography, said that he and Dean Stockwell never got along. Stockwell had previously played his role on stage, and had wanted his Broadway co-star Roddy McDowall in the movie. Stockwell and Dillman worked again on the little-seen South African thriller One Away (1976).