If West elevator is used by a shooter or shooters on the 6th floor it had to have been boarded by 10 sec post shots in order to have any probable chance of reaching 1st floor by 45 sec posts shots, just before Victoria Adams and Sandra Styles reach the 1st floor by 60 sec post shots. This presumes an elevator avg. speed of 1 floor per 7 secs. So 35 seconds from 6th floor to 1st floor.
The West elevator would have to immediately be returned back up to 5th floor and be there by approx 75 second post shots, to be seen there by Truly looking up the elevator shaft.
From 1st to 5th floor requring about 28 seconds, is possible therefore, for the West elevator to be back on the 5th floor at 73 sec post shots. JUST IN TIME!
But can the West elevator be "sent' back up by someone just having used it, by pushing a button, and it returns itself, or does this elevator require someone be IN the elevator to operate it?