This is a mix of your usual evasion, omission, and confusion, coupled with some downright silly stuff. I'm only going to bother answering some of the points.
How would Newman's being in "close proximity" to the headshot have caused Newman to hear a bullet whiz by him from behind? Newman was 15 feet from the limo at Z313 and the limo was to his left front. So do tell me how a bullet traveling from the sixth-floor window and hitting JFK's head 15 feet away to Newman's left front would have caused him to hear a bullet whiz by him from behind. You realize that Newman was so certain that gunfire was coming from behind him that he dropped down to the ground, right?
Oh, yes, Zapruder most certainly did categorically tell the SS that the gunman was positioned behind him. He expressed no qualification or uncertainty whatsoever, nor did he say that this was merely his "impression." He only started to waffle about the gunman's location later on.
So three cars doing an obvious recon in the parking lot behind the knoll in the 25 minutes leading up to the shooting, after the area had been sealed off by police, and with one of the drivers talking into a microphone -- nah, that's not suspicious at all, huh? Yeah, okay. You'll never admit anything if it contradicts the lone-gunman myth.
Show me where in Lee Bowers' WC testimony he said he did not see a gunman behind the fence. Give me the page number. His testimony is in 6 H 284-289. Where does he say he didn't see a gunman behind the fence?
Lee Bowers told Mark Lane there was no one behind the fence at the time of the shooting:
"Now I could see back or the South side of the wooden fence in the area, so that obviously that there was no one there who could have, uh - had anything to do with either - as accomplice or anything else because there was no one there, um, at the moment the shots were fired."
He also said he heard three shots. Not four. Or five. And they all came from either end of Elm Street; either by the Depository or "the mouth of the triple underpass". He wasn't sure. Three shots. All from one location.
This key witness you are promoting completely demolishes your conspiracy.
Link:
https://www.jfk-assassination.net/pdf/lane_interviews/bowers.pdf
