I would say exit holes.
Note that the lamp glass is broken on the left. Maybe from when they blew the door, or maybe from return fire by cops.
I’m not sure I believe the part about the cops returning fire. There was another version in which the cops get off the elevator and see the wounded security guard, but the shooting had already stopped and never started again.
Here is where we learn that the cops returned fire with Paddock.
That is exactly what we were told first!
That is exactly what we were told first! The cops waited for the SWAT Team to show up but no more shots had been fired.....WEIRD!