
Originally Posted by
Dan Druff
This hasn't been discussed anywhere to my knowledge, but I believe Stephen Paddock killed himself believing he failed.
His goal was to cause hundreds or thousands of casualties. He attempted to blow up large fuel tanks, failed, and then fired upon the crowd.
However, he still believed he would have a lot of time to fire on them until the police located him and stopped him, which is why he brought 23 guns up there.
Imagine his shock when he saw a security guard approaching his room just 12 minutes after he started shooting.
In reality, the guard was up there to investigate an alarm on a room door a little bit down the hall (I'm guessing triggered somehow from the broken windows or shooting causing an unusual vibration), and police response would be far behind. Nobody realized where the bullets were coming from at that point.
However, Paddock didn't know this, and figured they located him quickly. He didn't fire one bullet at the crowd after that, and likely killed himself right at that moment.
I bet that one of his last thoughts before killing himself was, "How did they find me and get up here so quickly?"