“The Zapruder film ends with a view behind the fence. Nothing there.”
The Zapruder film does not show the grassy knoll during the assassination. Abraham Zapruder was standing on the grassy knoll.
Orville Nix was standing across from the grassy knoll so he sort of captured it but the fence area is dark without any clarity.
https://www.youtube.com/playlist?list=PL0O5WNzrZqINVGfqd-M73A_czSbI__hat
No photos or videos or hard evidence for a shooter behind the fence. Just eye witness testimony of seeing and smelling smoke.
If someone fired from there I suspect they would have been well hidden and bailed soon after making the shot. Thus I am not surprised there is no photo or video evidence of it plus the cameras had limited clarity and resolution.
Some say Oswald fired that head shot but I find it difficult to reconcile that with a viewing of the zapruder film.
I think the execution details, shooters etc will remain unprovable.
Zapruder was not standing on the grassy knoll, but on the concrete wing jutting out into Dealey Plaza right adjacent to the grassy knoll. His secretary was right behind Zapruder kolding onto his jacket to give him some support as Zapruder had vertigo. If anyone shot a rifle from the picket fence behind the grassy knoll, it would have been to Zapruder’s immediate right at about 20 feet away. The top of the fence would (And still is) at the level of your feet if you stand there. Have you stood there? I have many times. You would be looking right down at the shooter. The Zapruder film pans across the top of the knoll and ends with a short glimpse of the fence and what was behind it. Nothing. You can’t convince me that Zapruder, with his Army training, would not be able to see and especially hear a shot if one had been taken from behind the fence. It did not happen.Nix captures Zapruder on his film.