@ John Mytton, the black male on the steps with Emmet Hudson and the other guy, he runs up the steps, right. From frames 410 onwards, why isn't he seen anywhere in the Z-film? when clearly by this time he made it to the top of the steps into knoll/wall area?
There's no obvious evidence of his breakneck speed effort to get up the steps.
Hi Robert, that's an interesting question, let's examine the facts.
1. Zapruder's camera was set up at the camera's zoomed in position.
2. From Zapruder's perspective he panned to the Fort Worth Turnpike sign about 6 seconds after the head shot and subsequently about 6 seconds after the black man turned and started moving up the steps.
3. From Zapruder's perspective the Fort Worth sign was not far off the line of sight as the initial position of the three men.
4. By the time Zapruder got to the fence area, the time was about 7 seconds since the black man turned and hurried up the steps.
Therefore the black man was long gone by the time Zapruder was in a position to film the black man!JohnM