You are assuming an accomplice would not have tried to leave until after Paddock finished shooting and therefore would have run into the security guard.
I don’t assume that.
Also we don’t know anything about how the fire door was supposedly blocked. The Sheriff made the comment the other day that it was not “welded” shut but otherwise didn’t elaborate.
If the fire door opens into the stairwell as one would think, then presumably it would need to have been blocked from WITHIN the stairwell. If that’s the case, then why did the security guard have difficulty entering floor 32 from the stairwell (if that’s still the version they’re peddling)?
If not, then how exactly was it blocked from within the corridor?
You could add a stick or something across the door jam and attached to the door. Heavy cable ties might do it. The stairway doors are always going to open into the stairway and not the hall. Broomstick from door jam to door jam, cable tied to the release mechanism would do the trick