At the Television Critics Association press tour in Los Angeles on Sunday, producers and investigators behind Reelz Channel's new documentary "JFK: The Smoking Gun" made the claim that George Hickey, a Secret Service agent riding in the car behind Kennedy, accidentally shot the president on Nov. 22, 1963. The film follows veteran police detective Colin McLaren in his four-year investigation of the assassination and points at Hickey, who died two years ago.