Prepare to be shocked. He forgot his camera at home, his secretary (who hold him atop the pedestal) had to remind him and push him to go get it. The only reason that film was not immediately confiscated was because Zapruder was interviewed on live TV before developing the film, and described what he saw though the eye finder. Time-LIFE wanted non-exclusive rights to publish it. After seeing it, they tripled/quadrupled the offer, for the whole thing.
Since you are interested in films, please watch these two videoclips:
The Lost Bullet Scenes - Part 1
The Lost Bullet Scenes - Part 2
I have spoken and/or exchanged e-mails with EVERY person you see there, except the producers, Max Holland and Larry Sturdivan. Additionally, the Library of Congress designated a person as my point of contact.
I have a couple of quotes to repeat that work. They ALL want to come clean. Michael Wilder tells me that in his improved restoration technique is based on infrared.
Bilbob: We all may have opinions, even educated ones, of course. But ultimately it is not up to us to determine the legitimacy of the Z film, the X-rays, etc. At some point we will be pushed aside:
“Move over, boys. After almost 60 years, the adults have finally arrived”
We techies have found the Kryptonite, the Achilles Heel.
ps: By “adults” I refer to the Scientific Community: MIT, Stanford, etc.