Garner claimed she followed behind Adam’s and Stiles “almost immediately” as they left the 4th floor office. But she clarified in her interview with Barry Ernest that she did not actually see them go down the stars (as per her original statement in the Belin memo,) but that she did HEAR them when she walked over to the staircase and stood looking out the west window nearest the staircase.
To be able to hear 2 girls on the stairs , heels clacking , voices , or whatever noise it was that Garner heard that made her think it was more than just 1 person on the stairs, means that Garner most likely exited the office approx. 30 sec post shots , walked the next 60 ft in about 10 secs and thus was near the staircase by 40 sec post shots.
To make it work with Oswald as a shooter who wipes prints off the rifle and hides it in the boxes requires about 40 secs total before he could start down the staircase, and eith the fastest probable speed of running down stairs skipping 3 steps at a time and crossing 20 ft floor landing =10sec/floor, Oswald would not be going down the 4th floor stair until 60 sec post shots.
So unless there is any other statement that Garner made that suggests she thought that at least 65 secs elapsed before she exited the office , then the only way Oswald could have gotten past her unseen would be to take the east elevator.
Tom, I hope you will pardon my not so precise English grammar and offer an opinion of how probable it is that Garner would describe a 65 secs span of time as “almost immediately”.
