Then went outside to watch P. parade ( Parts 1 & 2 )

[Alan Ford]

The Towner film is showing us TWO figures in red:
a) Mr. Lovelady watching the motorcade from a seated position
b) Mr. Oswald waving a flag energetically at the motorcade from a standing position.

Furthermore!

Comparative scrutiny of the game-changing Bell & Towner Davidson Stabilizations allows us to notice something else.

Bell shows Mrs. Madie Reese raising her right arm a little higher:



I believe this may account for the sudden appearance of WHITE in FRONT of Mr. Lovelady's shirt at the very end of the Towner doorway footage:



Either that, or it's Mr. Lovelady's white tshirt coming into view as a result of some movement on his part.

[Chris Davidson]

Any possibilities for this person?
Universally lightened:
https://vimeo.com/874304340?share=copy

[Dan O'meara]

Any possibilities for this person?
Universally lightened:
https://vimeo.com/874304340?share=copy

I believe that chap is the elusive Jack Dougherty.
He's very tall and, by his own admission, was in this area around the general time this image was taken:

"Mr. DOUGHERTY. Well, when the FBI men---I imagine it was who it was---he showed me his credentials, but he asked me who the manager was, and I told him, "Mr. Truly." He told me to go find him. Well, I didn't know where he was so I started from the first floor and Just started looking for him, and .by the time I got to the sixth floor, they had found a gun and shells.
Mr. BALL. When you went up to the sixth floor, it was after they found the shotgun and shells?
Mr. DOUGHERTY. Yes, sir..."

[Zeon Mason]

Why are /DPD/FBI   even allowing any TSBD employee to be hanging around on the 6th floor at the time all there doing their investigation/ arranging evidence?

The guys face looks like Lovelady but what the reason Lovelady  is by himself on the 6th floor is uncertain.

Maybe Lovelady had been given an  order by Fritz to hang around on the 6th floor as an elevator operator?

[Dan O'meara]

Why are /DPD/FBI   even allowing any TSBD employee to be hanging around on the 6th floor at the time all there doing their investigation/ arranging evidence?

The guys face looks like Lovelady but what the reason Lovelady  is by himself on the 6th floor is uncertain.

Maybe Lovelady had been given an  order by Fritz to hang around on the 6th floor as an elevator operator?

He seems to be a lot taller than Lovelady.
Dougherty was 6'2" when he was 19.
He's also not wearing Lovelady's trademark checked shirt.

[Zeon Mason]

Dougherty overacting being an innocent observer?

[Dan O'meara]

Dougherty overacting being an innocent observer?

If it is Dougherty, and that's just a guess, he was up there looking for Truly apparently.
At some point Dougherty is asked by Shelley to guard the elevator (near the front of the building I guess). I'm assuming it's while he's doing this an FBI man asks him to find Truly. Dougherty goes through all the floors but can't find Truly. Eventually he ends up on the sixth floor after the rifle has been found.
The pic Chris posted is taken after the rifle has been found and before Fritz leaves, between 1:30 and 2:00pm.