A new twist

The narrative on the Las Vegas shooting took a sharp turn today when it was revealed that the security guard was shot first. He was shot at 9:59 PM. Paddock opened fire on the crowd approximately six minutes later. One small fact in this has me puzzled, supposedly 200 rounds were fired at the guard in a narrow hall of minimal length, and the guy was only hit in the leg?
According to the brief, Campos was investigating a door alarm. Most likely that would be for the stairwell. Hotels don't care if people use the stairs, but if the door is blocked open, it is a potential route for fire to spread rapidly. When Campos got there he heard drilling in Paddock's room and seeing the door ajar, entered to investigate.
The claim for now is that he was drilling in the wall next to the door.  Some speculate he was going to install another camera. My guess would be a firing port. That wall would have been solid, either poured concrete, or block, certainly more substantial than a wood door. Typically that is the case since that part of the wall must with stand a lot more abuse from doors opening and closing.
According to the brief, the stairwell door was blocked, That means Paddock installed a plate to stop the SWAT from coming up the stairs,or at least slow them down.
This seems to indicate that Paddock was not intending to start shooting when he did. What was he waiting for, and why? What about the explosives in his vehicle? I have a theory. I expect Paddock was planning to wait until the Festival released to start shooting. He might have planned to call for valet service to bring his vehicle our front, then bust the window as it was driven out, shoot the vehicle detonating it in close proximity to the crowds, then open fire amid the confusion.
That would explain the second window, line of sight to where his vehicle might have been intended to be.
As for the misleading and incorrect information the FBI and police have given, It is all part of the investigation and necessary. Police commonly hold back critical information because then the truth is known to only the perp and the Police. When some one drops info that is correct and secret, it reveals them as a potential player. If law enforcement had their way, the truth wouldn't come out until the trial.