If my use of the word shooter annoys you tough titty, but I'll explain myself again for your circular benefit. Brennan claimed to see a man with a rifle at that window and three cases were found at that window. So Brennan saw something at that window. Or he was ''in on it' along with half of Dallas.
Dallas Morning News reporter Hugh Aynesworth was watching the motorcade on Houston Street as he heard shots fired. He immediately ran to the TSBD building - he said he was there within a minute of the shooting - and started to interview the people there. Here is his account of seeing Brennan:
So before ANY evidence was found - and while many people were running towards the grassy knoll or the parking lot behind it - Brennan was pointing out that he saw a shooter in the building. He just got lucky, then, that other corroborating evidence supports his account.
The claim, then, that right after the shooting - within a minute - Brennan decided to just make a story up about seeing a shooter defies logic, credibility and common sense. In conspiracy world those aren't allowed.
Although, of course, Aynesworth is also accused of being a liar and, in fact, has been accused of being a CIA asset.