There is no taking anything away from the tragic events in Las Vegas, but I have to wonder, how does a person walk into a hotel, that has multiple security cameras, with several guns and going by the number of injured, thousands of rounds of ammunition?

Apart from the bulky, not so easy to put in a suitcase shape and size of long barrelled weapon systems, the weight of that may rounds and the magazines required to house them, so as not to have to reload after every 30 to 50 rounds, is not something that is easily disguised.

Then of course there's the question of how he opened the window and did not cause a noticeable change in pressure not the 32nd floor. Now the hotel may have employed rent a cops who were drinking coffee and eating donuts, but this is Vegas, not the sort of place that would go for the whole rent a cop thing.