Does Occam’s razor explain why the CIA of 2017 wants to keep secret information from 1963? Gonna reveal the secrets of the newest microfilm camera? Of the idea of using spy satellites in orbit? That would be like the Eisenhower administration demanding that the secrets of Teddy Roosevelt and the Spanish American war.
If they want it kept secret, or if it isn’t all released without delay, Occam’s razor tells us why.
Forensic evidence of Zapruder’s movements while filming the entire incident shows three shots.
Oswald fired three shots. Why re=invent the wheel here?