There is insufficient information to reconstruct Oswald's movements before the assassination. There was no real cause of others to take notice of him or the specific time down to the precise minute of mundane events that were occurring in the building before the assassination. What we know with certainty is that Oswald was in the SN at 12:30 based upon the evidence that he left behind.
What we know with certainty is that Oswald was in the SN at 12:30 based upon the evidence that he left behind.Really?..... You can know that Lee was in the so called "Sniper's Nest" at 12:30 based upon the evidence that was found there?
Please enlighten me .... Let's start with the spent shells....( Originally there were only TWO shells but that number had to be changed after most witnesses reported that they heard more than two explosions.) But HOW do those spent shells provide any information about when they were fired?
We'll move along to another piece of "Evidence" after you present your answer.....