Another point to consider.
Mr. Frazier heard that shots had been fired from the building. He heard a rifle had been found in the building. He heard that Oswald had disappeared from the scene and the police were looking for him.
Did Mr. Frazier immediately go to the police and tell them about the long package Oswald brought to work with him that morning?
No. He did not.
What were the consequences of not doing so?
A grilling for several hours while the police pressured him into not confessing.
Mr. Truly was an older and likely wiser man. Unlike Frazier, as soon as Oswald entered his mind as a possible suspect, he started acting. He knew it would be unfortunate to help someone, however innocently, if that person was the assassin. If he tells the police nothing, and they find out that Oswald is the main suspect, the police are going to start wondering:
** How is it Mr. Truly just happened to be on hand to ?guide? Officer Baker.
** Why did Mr. Truly ?guide? Officer Baker to an elevator that was not working. Doesn?t he know which elevators are working and wouldn?t he be able to immediately tell if the elevators were locked up?
** Why didn?t Mr. Truly first lead Officer Baker up the stairs where they would have immediately found Oswald, possibly coming down the stairs. Was Mr. Truly trying to delay Officer Baker long enough for Oswald to reach the second floor and get to the other stairs?
** Why didn?t Mr. Truly make immediate inquires into which employees were there at the time of the shooting but had now disappeared?
If Mr. Truly did nothing, he might have ended up being grilled for hours by the police.