Bumped for thomas to read properlyFrom Vicki's Feb '64 interview with Jim Leavelle,
"Then the second shot I saw the Secret Service man run to the back of the President's car. After the third shot I went out the back door. I said, 'I think someone has been shot.' The elevator was not running and there was no one on the stairs. I went down to the first floor. I saw Mr. Shelly and another employee named Bill."
Until Barry Ernest, Vicki is consistent that she left the fourth floor within seconds of the shooting. She ran all the way down the stairs and out the north loading dock door. She was on the first floor approximately 60 seconds after the last shot and saw Lovelady and Shelley near the elevators on the first floor.
The WC Sham used the easily disprovable lies of Shelley and Lovelady to discredit Vicki's account of her descent from the fourth floor. Even though these lies flatly contradicted the time trials conducted by the Sham involving Baker and Truly (something Vicki's account did not do).
So, let's take Vicki at her word and see where that takes us.
1] The pic taken by Tom Dillard approximately 10 - 15 seconds after the head shot showing the empty 4th floor window where Vicki and her colleagues makes sense. Vicki had decided to head downstairs before the limo had even reached the underpass. She and Sandra have raced off followed by Garner. which is why the window is empty seconds after the shooting.
2] The Stroud document makes sense. The only way Vicki and Sandra could make it down the stairs before Truly and Baker came up the same stairs, without either party encountering the other, is for Vicki to head off within in seconds of the head shot, race all the way down and be through the loading dock door before Truly and Baker reached the area near the elevators.
3] Baker's observation of two white men in the area near the elevators makes sense as being Shelley and Lovelady.
4] The affidavits of Shelley and Lovelady make sense. When taken at face value, the two men never made their way along the Elm St Ext., never hung around the railroad yards and never re-entered the building through the west door. After Shelley ran across the street and returned, both men immediately re-entered the TSBD building and made their way toward the back of the first floor where they were seen by Adams and Lovelady.
5] The Baker/Truly time trials make sense. The 3 minute lie, told by both Shelley and Truly can now be ignored. Baker and Truly were not still outside the building over 3 minutes after the shooting.
6] The Darnell footage makes sense. It confirms that Baker had arrived at the bottom of the steps within a few seconds of the shots supporting the time trials and refuting the lies of Shelley and Lovelady. It confirms the accounts of both Lovelady and Frazier regarding Gloria returning to the steps and telling everyone about the shooting.
This still from Darnell shows the moment Gloria is interacting with Lovelady on the steps. Shelley has just returned from across the street. This image is taken around 30 seconds after the head shot. Vicki is already on the stairs. Baker, Truly, Shelley and Lovelady are all about to enter the lobby. Shelley and Lovelady immediately make their way to the back of the first floor followed seconds later by Truly and Baker.

If we accept Vicki's version of events there are two questions that need answering:
Why did Shelley and Lovelady lie about their movements in the immediate aftermath of the shooting?
Why did they feel the need to race toward the back of the first floor?