The story keeps changing.

Seems like the cops would have showed up asap when a guard got shot. I don't get it.

Absent really knowing much about the condition of the guard and his ability to communicate after he was wounded, I'm pretty sure the hotel has been seeking to manage information about what went on there, as they attempt to anticipate potential liability issues.

On edit:

Apparently the location and condition of the guard was either not known to the hotel, or not communicated to police:

Police officers who started searching the hotel after the shooting began didn’t know a hotel security guard had been shot “until they met him in the hallway after exiting the elevator,” Lombardo said. He didn’t say whether Campos notified casino security after he was shot.

breaking the windows?

That was by the room. He went to investigate it and that's when he got shot. Earlier report had him showing up outside the room after the shooting had stopped and he was publically credited for diverting the shooter's attention.

And coupled with the comments from the sheriff about possible escape plans, that's kind of fishy. Assuming the hotel doesn't have full security camera coverage of all the floors, otherwise the police would be able explicitly rule out someone else being there beyond the "absence of evidence."

was bolted shut by the shooter. So that can't be right.