Post 11/22/63 the world has been doctored. I hadn’t yet heard that the Zapruder film had been doctored. But, as we say all too often these days, “nothing would surprise me”. Jim Garrison is the guy who “discovered” that the initial route of the motorcade was to proceed straight down Main St. It is his “theory” that someone changed the route to turn right onto Houston St, then left on Elm to go right directly past LHO hiding in the Book Depository building. Maybe he’s right and maybe he isn’t.
Do a search on youtube about it. It will convince you.