Yes, old Lee took his over two-foot long lunch bag to the lunchroom and had a leisurely meal while the motorcade drove by. He, the most politically minded person in the entire workforce who had read JFK's book, had no interest whatsoever in the president driving by that day. And his fingerprints showing up on the SN boxes by the very window from which the shots were fired, just another wild streak of bad luck. And after going to the considerable risk to frame Oswald for this crime, of course the conspirators would just let him roam about in the public parts of the building like a lunchroom where he could very well have been seen (as CTers allege here) and been given an alibi. Thankfully the person who did see him decided to hold off a decade or so to tell her story. That is the kind of lunacy that you are dealing with here.