This image provided by Warner Bros. from Oliver Stone&#x27;s 1991 movie &quot;JFK&quot; shows Kevin Costner as New Orleans District Attorney Jim Garrison demonstrating the &quot;magic bullet&quot; theory. Critics say Stone&#x27;s film has done more than anything to shape the public&#x27;s perception of President John F. Kennedy&#x27;s assassination. &quot;He made this kind of paranoid conspiracy theory respectable,&quot; says New York writer Arthur Goldwag, author of &quot;Cults, Conspiracies, and Secret Societies.&quot; The movie tells the story of a New Orleans District Attorney played by Kevin Costner. Garrison remains the only prosecutor to bring someone to trial for an alleged conspiracy to kill Kennedy. (AP Photo/Warner Bros.)