I posted the following Gif in Reply #739. It's based on the work of Sandy Larsen and Tommy Graves and their identification of Gloria Calvery
http://educationforum.ipbhost.com/topic/25790-the-identification-of-gloria-calvery-in-zapruder-and-darnell/
It shows the moment Calvery tells Lovelady (on the steps) about the assassination. It is my belief the man in the baggy black suit at the bottom of the steps is Bill Shelley. Larsen and Graves put forward a compelling case for the identification of Calvery and, if accepted, we can state the following:
Shelley and Lovelady lie in both their affidavits and WC testimony.
Calvery, Shelley and Lovelady are at the steps at the same time Baker races past Truly (it seems to me that Shelley is looking directly at Baker as he approaches).
When they get their stories straight for the WC Shelley and Lovelady state that Calvery doesn't reach them for 3 or 4 minutes. The Gif shows this is a lie as does the fact Lovelady states Calvery comes running up and she only has about 100ft to travel, easily bringing her to the steps at the same time as Baker.
Shelley and Lovelady state they make their way to "the little, old island" (both use this exact phrase) in front of the TSBD. I believe they are here for 3 or 4 minutes for the following reason - after leaving the island they "walked on down to the first railroad track there on the dead-end street and stood there and watched them searching cars down there in the parking lots for a little while". This would have them at the west corner of the TSBD by the spur track, exactly the same place Adams and Styles walk by after their conversation with the police officer who won't let them pass. As they never meet I'm assuming Adams and Styles have already passed this position by the time Shelley and Lovelady get there.
From Sandra Styles' FBI 302 provided by John Iacoletti (reply #725) it appears Styles goes straight into the building and uses the passenger elevator to get back to her office. Adams stays outside, chatting to colleagues, at some point she hears the messge on the police motorcycle radio and has to talk her way past a police officer to get in the building. Once inside she tries the passenger elevator but it doesn't work so she walks up to the second floor. That she is free to use the elevator is possibly important in the timeline of Shelley.
After a short while by the spur track Shelley and Lovelady enter the TSBD through a side door at the west end of the building. At some point, as Shelley states, "Mr. Truly left me guarding the elevator, not to let anybody up and down the elevator or stairway." He says elevator, singular, he says exactly the same thing in his affidavit, which implies the passenger elevator. If it is the case he is guarding the passenger elevator then this must be
after Adams has tried to use it, found the power was off, then used the stairs.
Provisional Timeline
12:30 Final shot
12:30.30 - 12:31 Calvery arrives running to the TSBD steps, tells Shelley and Lovelady about the assassination.
Baker races past Truly and into the building followed by Truly.
Adams and Styles hit the stairs and race out of the Back door
Baker/Truly reach freight elevators then begin running up stairs
12:31 - 12:32 Shelley/Lovelady go across to "little,old island"
Baker/Truly lunchroom encounter (?)
Adams/Styles encounter with police officer at the spur track
12:32 - 12:34 Adams/Styles round the front west corner of TSBD
Shelley/Lovelady make their way to the same corner
12:34 - 12:36 Styles makes her way inside, no officer on the door, takes the elevator
Adams chats with colleagues out front
Shelley/Lovelady enter side door
12:36 - 12:38 Adams hears radio message and tries to get back in but has to talk her way past a police officer. She tries elevator then uses stairs
Shelley/Lovelady enter first floor
At some point shortly after this Shelley is told to guard the elevators and stairway.
Remember - it's only provisional.