Anyone who believes there was a conspiracy, and Mr. Oswald was not the sixth-floor shooter, but that it would have been left totally to chance that the sixth floor would be clear of employees at the time of the motorcade's arrival in Dealey Plaza--------------needs their head examined.
Remember! Mr. Bonnie Ray Williams recalled an informal arrangement amongst sixth-floor crew that they would come back upstairs to watch the motorcade from the sixth floor. The perfect vantage point, but it never happened....................... An AMAZING, you might almost say: INCREDIBLE, stroke of luck for the plotters!
No, the sixth floor would have been secured. It would therefore make perfect sense that any male manual workers still in the building a few minutes before the motorcade would be found and told (by 'law enforcement') not to go up to the sixth floor. Mr. Oswald in the second-floor lunchroom would have fallen into this category. His manual-workman clothes would have led to his being singled out by the 'cop'.