I am a little surprised that you don’t see the change in Jackie’s expression. When shown your excellent graphic, my wife said that she looks “happy” in the Towner photo and “concerned” in the Croft photo. Those are her words with no leading questions from me.
It is dangerous to try to discern mood from a single photo. In Towner Jackie is smiling in a way that was likely not sustained during the entire motorcade. So a change in her facial expression does not mean much. The President waved and smiled after that. Mary Woodward said that she shouted to the President and both he and Jackie turned and smiled and waved at them. That occurs after Croft 162 as seen in the zfilm.
There is too much evidence against an early first shot.
1. First of all you have all the motorcade witnesses who put their car much later in the turn than z150-160 at the time of the first shot (see my earlier post).
2. Then you have
all the people along Elm who said the had just passed them or was just passing or was approaching them or was opposite the Thornton sign or JFK was "between me and the Stemmons sign" putting the shot after but close to z190.
3. Then you have all the
witnesses who said that JFK immediately reacted to the first shot before the second by bringing his hands to his chest/neck, moving left, blank stare, surprised look, appeared to duck etc.
4. Then you have the photographers who put the first shot a perceptible time after they took their photos/film (Hughes, Betzner and Croft) which puts the first shot after z186.
5. Then you have all the witnesses (over 40) who said that the last two shots were much closer together than the first two, which puts the second shot after z225 when JFK is seen to be reacting to the bullet that struck him.
Each these five independent bodies of witness evidence is inconsistent with a first shot before z186-190. And they are all consistent with each other. If you ignore this evidence you will not be able to determine the correct shot pattern. The correct shot pattern is consistent with Oswald firing all three shots and inconsistent with the SBT.