In the wake of the Warren Commission’s report on the assassination of John F. Kennedy, de Antonio collaborated with author Mark Lane to investigate the consequences of these oft-disputed findings. Rather than seeking to explain what actually happened in Dallas, de Antonio and Lane draw on interviews with witnesses to expose the inconsistencies of the report. Although the perceived impartiality of cinéma vérité was in vogue at the time of the film’s release, de Antonio was steadfastly opposed to such techniques and made no attempt to conceal his suspicions about the U.S. government: “Lee Harvey Oswald was executed and tried without a defense…this film is his defense.”