Hidden Influence July 12, 2018 | Milicent Cranor Tags: film editing, film tampering, JFK, Kennedy assassination, Nix, Zapruder JFK Assassination Film: Proof of Tampering? Reading Time: 13 minutes No need to rely on eyewitness testimony. Be your own witness. See if we prove that action seen on the Nix film of the assassination is missing from the more well-known Zapruder film. Or not.