I agree with Tony that its not likely that Shelley and Lovelady could have been standing by the rear elevators at 60 sec posts shots, because both of them are seen outside TSBD in the Couch film moving away from the TSBD at approx. 25 sec post shots when Baker is seen running towards the entrance. It would have been about 35 sec post shots then, when Baker and Truly would have been together on the front steps, and that's when Lovelady would have seen them. Lovelady and Shelly then continued walking even further away from TSBD:
Mr. BALL - First of all, let's get you to tell us whom you left the steps with.
Mr. LOVELADY - Mr. Shelley.
Mr. BALL - Shelley and you went down how far?
Mr. LOVELADY - Well, I would say a good 75, between 75 to 100 yards to the first tracks. See how those tracks goes---
Mr. BALL - You went down the dead end on Elm?
Mr. LOVELADY - Yes.
Mr. BALL - And down to the first tracks?
Mr. LOVELADY - Yes.
75 yds is 225 ft, so at 35 sec post shots after having seen Baker and Truly at the front entrance, Billy Lovelady travels to some point 225 ft away from the west side entrance of TSBD and then must travel back again to have entered TSBD again. So 550 ft at 5 ft/sec pace would require an additional 100 secs added which therefore puts it about 2 min post shots as the earliest that Lovelady and Shelly could have returned into TSBD by the west side loading dock ramp.
The Jack Dougherty dilemma: When did Jack take the West elevator down or if he did not, who did?
If its JD, using the west elevator by himself, there are only 2 options:
1.West elevator taken down about 5 sec post shots, reached 1st floor approx 30 sec post shots, and then elevator returns itself to stop at 5th floor by 70 sec posts shots. JD walked across 1st floor at least about 85 ft away from west elevator to talk with Eddie
Piper standing near a window at the front of the 1st floor TSBD.
2. West elevator taken down about 5 seconds after Truly/Baker left elevator shaft to start up the immediate rear staircase approx 75 sec post shots. The West elevator started therefore from 5th floor at 75 sec post shots, went past the 2nd floor landing at approx 90 sec post shots while Baker is in the 2nd floor lunchroom, and Truly looking from outer door. Baker//Truly are unaware elevator went past being distracted with Oswald.
If a 6th floor shooter from SW window used the West elevator begining 10 sec post shots, and the elevator travels 1 floor/5 sec speed, the West elevator would reach 1st foor by 35 sec post shots. It then would have returned itself, upon gates being closed by the shooter, to the 6th floor by 70 sec post shots, where it would be seen by Truly looking up the shaft, and guestimating it to be on 5th or 6th floor. The West elevator could have remained on 6th floor when Truly.Baker reach 5th floor, or a 2nd shooter on 6th floor could have taken it down beginning 75 sec post shots, passing by 2nd floor landing 90 sec posts shots, as in the JD scenario option.