10:15 Last shots outside building.
10:17 First two officers enter 32nd floor after hotel dispatch reports guard locating room.
10:18 Officers radio guard was shot and located.
So guard must have interrupted shooter at around 10:15.
The Sheriff said the officers were only seconds behind the security guard, and would have been at the hotel room door 60 seconds later if not for the guard.
What if the job of the second person was to shoot at the fuel tanks out of the second window. He does his thing and runs out at say 10:10, leaving the door ajar.
Paddock finishes up shooting at the music crowd at 10:15. Maybe the plan was to shoot for ten minutes and no more, and then get out.
Paddock had finished shooting and is about to run out when the security guard shows up at 10:16. He picks up an unused rifle and from a prone position unloads a mag through the bottom half of the door at the guard. He then sits up and shoots himself with the revolver, and the rifle ends up resting on his leg.
The cops immediately arrive and all is quiet from that point up.
Much easier to blow up tanks by driving car near tanks. Throwing explosives near tanks along with an explosive timer. Or shooting at an explosive loaded bag near tank from a few hundred yards. Or driving a suicide vehicle wired to explode. Shooting tanks from window was just a dumb idea. Only way it would have worked would be if explosives were taped to tank and fired at.
They wanted hundreds dead. He probably figured 20 minutes of shooting as tanks exploded or caught fire. Good night and stay safe.