(Title changed from "How long did it take Officer Baker to reach the TSBD's front steps after the 3rd shot?" to "There seems to be a problem with Officer Baker's testimony.")
According to Mark Tyler's synchronized map of the motorcade, after the 3rd shot it took DPD officer Marion Baker 15 seconds to park his motorcycle.
Baker testified to the Warren Commission that after he parked his motorcycle, he heard over its radio Chief Curry say "send all available men to the
railway yard (or words to that effect) and started running towards the TSBD front steps at that time.
Curry spoke that "railway yard" order twice -- the first time was 65 seconds after the 3rd shot, and the second time 15 seconds after that (because the dispatcher didn't fully understand the first transmission).
According to Mark Tyler's graphics alone:
12:30:00 -- The Z-313 fatal head shot occurs
12:30:15 -- Baker parks his motorcycle
12:30:20 -- Baker starts running towards the front steps
12:30:25 -- Baker arrives at the TSBD front door.
However,
According to a combination of Baker's WC testimony, the audio of the DPD radio transmissions as synced to the timing of the fatal head shot by Tyler, and Tyler's graphics as they pertain
only to the 1) 12:30:00 fatal head shot, and 2) the 12:30:15 parking of Baker's motorcycle:
12:30:00 -- Fatal head shot
12:30:15 -- Baker parks his motorcycle
12:3
0:35 -- Curry transmits "get men up on the
overpass"
12:3
1:05 -- Curry transmits "get men to the
railway yard" and Baker, per his WC testimony, starts running towards the steps at this point (or perhaps 15 seconds later -- see below)
12:3
1:20 -- Curry re-transmits "get men to the
railway yard," and Baker, possibly like the dispatcher now able to understand what Curry had said 15 seconds earlier, now starts running towards the steps.
. . . . . . .
If Baker started running towards the front steps 65 seconds after the 3rd shot, big/tall, black blouse and black headscarf-wearing Gloria Calvery and her dressed-all-in-white colleague (Karan Hicks or Carol Reed), who were standing about 90 feet down Elm Street from the front steps during the motorcade, had plenty of time to walk or run to the TSBD and be on the steps in time for Calvery to tell Lovelady and Shelley, about ten seconds before Baker arrived there, that JFK had been shot. (I say ten seconds because in Couch-Darnell we can see Lovelady and Shelley almost as far as the "Huge Gates" on the side of the building as they are (apparently) on their way to the railway yard / parking lot for a quick look-see, after which they returned to the TSBD and entered it through a rear door.
In this scenario, it's possible that Officer Baker didn't enter the TSBD until at least 70 seconds after the 3rd shot. Ergo Truly (who can be seen in the Darnell clip standing in front of the TSBD and watching Baker run past him), followed by Baker, may not have reached the 2nd-floor until at about a minute-and-a-half after the 3rd shot, thereby giving Oswald plenty of time to reach the lunch room on that floor before they got there.
If Vicki Adams and Sandra Styles lingered at the window, watching all the commotion going on below, and then talked with Mrs. Gardner for a grand total of about a minute and twenty seconds before starting down, Oswald, Truly and Baker may have been out of sight inside the lunchroom's "vestibule" when they were quickly traversing the corner of that floor on their way downstairs.
https://www.marktyler.org/mc63.html?fbclid=IwY2xjawK4zONleHRuA2FlbQIxMABicmlkETFFODdsRHVIa2RSUGZJNllFAR6Zx-0JB5zBmwy-qakJKtfLfY5vcW9V2IqOrNXjP-oezkHhb-av38NlRUa-uA_aem_2d95NRPz2dpt6k_03l7iYgCaveat:Even if Baker conflated Curry's 12:30:35 "up on the overpass" with his 12:30:05 "to the railway yard?" transmission in his WC testimony as to when he started running towards the TSBD, it still doesn't jibe with what we see happening (e.g., Baker's running's juxtaposed with motorcade cars' and motorcycles actions) in the Couch-Darnell clip.
