It seems Amos Euins was either mistaken or lying in "The Lost Bullet" when he said he crouched behind the pillar that we now know Toni Glover was standing on when the presidential limousine passed by.
It turns out that he was sitting on the pillar opposite Toni's (Howard Brennan was sitting on the curved wall between them).
To see for yourself, go to the 00:37 mark in the Mark Bell film, and look at Z-170 and Z-176 (in which it can be seen that the kid I'm talking about is a Black kid, and he's wearing his light-colored jacket and sitting on the wall directly above Robert Croft.
MARK BELL FILM ZAPRUDER FILMhttps://assassinationresearch.com/zfilm/z176.jpg