A subsonic 6.5mm or 5.56 mm round fired in a short barrel 10” rifle with suppressor and no one would have heard it. But this position from the GK pergola would be shooting laterally at a moving target so I’m not sure a professional would choose this spot on the GK where Betzner and Willis are pointing cameras at and where lots of the crowd are looking at.There is no indication on the JFK lateral skull X-rays that there was damage on the left side of the skull where such a lateral shot from the GK pergola would have exited , except possibly the Harper fragment if it came from the top of the skull ( which is debated).Nonetheless, the mystery man in black walking away along the low wall from this GK pergola location seconds after the head shot at Z313 is an amazing coincidence to consider.
I know you recall several giving testimony that the limousine slowed down to a near halt...If this was the planned "kill zone" then perhaps the target wasn't moving... or was moving very slowly...And just one look at Bill Greer rubbernecking up until the fatal shot, strongly suggests he knew exactly what he was supposed to do that day... apply brakes...
More definition and highlights...You can see the end of the barrel and profile of a gunman...
Correction. YOU can see the end of the barrel and the profile of a gunman. The rest of us, not so much.