What makes you think Brennan saw Oswald, or that Oswald made any shots?
I have never bothered to read up much on conspiracy theories that Oswald didnt fire shot-1 & shot-2, ie that there was someone else in the TSBD, or someone from another building, or grassy knoll, or picket fence, or drain entry pit, or Greer etc.
And i am only mildly interested in things that happened outside Dealey Plaza, or on some other day.
My (others mostly) ideas re the 6 or 7 shots fit exactly & simply with what we know (hole in floor of limo)(eg cracked w/s)(dent in chrome)(ricochets on tarmac & curbs)(Tague).
There are a few interesting puzzles questions mysteries remaining for sure, & i might spend time on these, but none of these are necessarily fatal to my theory.
I am of course very interested in anything possibly fatal to my theory. It only takes one good contradiction to sink it (or some part of it).
I debunked the Hickey debunking. In fact i found more evidence. The 2017 Bronson frame that supposedly shows Hickey sitting & holding the AR15 at 45 deg up at the time of Z313 i found to be at Z315 (which was already known), & in fact the 2019 superior copy shows that the AR15 is swinging up quickly which confirms a shot at Z313 rather than disproving (which nobody knew).
Oswald did not fire a third shot, not even at the same time as Hickey's shot. But Oswald could have, the bullet was in position, Oswald was in position, JFK was in position,
but Oswald decided to not fire. Why? He knew that his first shot had missed. He knew that his second shot had hit.
And he was satisfied. Why? And then he saw JFK's head explode at Z313, & he probly saw that Hickey was the shooter, & he probly realized that it was an accident. It would have made an interesting court case, but Ruby spoiled that.
Getting back to Oswald i haven't looked into the paraffin test stuff, but i think that it aint foolproof. And fingerprint stuff. And timing of exit from TSBD. What was Oswald's escape plan, Mexico - Cuba?? But anyhow none of that stuff is of great concern. Oswald acted alone & everything fits, if u ignore 99% of the krapp coming from 99% of the witnesses.
I did read a bit of that stuff re Brennan's eyesight, & being able to see & identify Oswald in the window & in the line-up etc. Thats interesting but not critical. It probly just reinforces that the cops too wanted Oswald to go down. I skimmed over that stuff in the WC. And i dont think i have read one word of the other 2 investigations or whatever. Everyone starts these investigations etc by writing ASSASSINATION on the front page.