Whereas only one lone witness, Mr. Piper (Eddie) says he saw Roy Truly at the rear stairs, two problems still exists for the hastily contrived script:
(1) Mr. Piper's testimony merely accounts for some guy accompanying Roy Truly, with an inference upon he was wearing street clothes instead of an unmistakable uniformed-dressed motorcycle policeman in an obvious white-helmet & long black-boots).
(2) Mr. Piper also reveals that his sighting of Roy Truly comes several minutes after the shooting sequence, so much for the immediate mad dash upstairs.
Again, a more likely scenario given the reveal of the wrongly accused actually being outside (not to mention that no one else can be accounted for standing in Prayer Man's position per all of the CE 1381 statements )
He slips back inside, taking up a position near the first-floor storage room amid his shock & disbelief about what just happened. He is sighted here by Mr. Campbell and his party returning inside the building. Given the first-floor storage room's close proximity to the first-floor elevator in the front of the building, he is "this man" who comes to the aid of Inspector Sawyer who enters the building at 12:34PM. WC counsel didn't seem interested in identifying Inspector Sawyer's, quote "this man", quickly steering the questioning elsewhere during Inspector Sawyer's testimony.
Later the officials realize they still have a problem when word gets back to them that a Ms. Judy McCully just happened to see Inspector Sawyer's entourage disembark from the elevator on the 4th floor (her statement was subsequently changed to being outside rather than upstairs to avoid the reality that she actually saw the wrongly accused).
Upon returning downstairs after assisting Inspector Sawyer, the wrongly accused continues to be helpful: aiding Mr. Allman and subsequently Mr. MacNeil (Robert), giving them directions to where they may use a phone, then continues past Mr. MacNeil outside, where he spends 5-10 minutes with Mr. Shelley.