There is zero forensic, medical, or eyewitness evidence of a gunman on the GK. Nothing but a bunch of people who thought the shots sounded like they came from that direction. Another bunch of people said the shots sounded like they came from the direction of the TSBD. There is forensic evidence and eyewitnesses who corroborate the latter group. There is zero corroboration to support the former.
John, nobody can place Oswald in the window at 12:30 but I believe he was there and fired 3 shots. The assassination happened so fast any shooter could have disappeared quickly standing behind the fence. Here's what we know:
1. Lee Bowers saw men standing behind the fence, Bowers described the shots as bang.....bang bang
2. S.M. Holland heard the shot and found fresh footprints and cigarette butts.
3. Joe Marshall Smith encountered a man flashing SS credentials, there were no agents assigned to the GK
4. Clint Hill said the head shot sounded different than the Z-223 shot, saw wound to back of head
5. Jiggle analyses show the two largest episodes during the Z-313 and Z-327 time frame