(
Las Vegas is the land of casinos. Every square inch of it is probably under surveillance. You can't whisper or count cards in a casino without being caught on camera. But apparently they won't notice if you bring enough guns, ammo and equipment for a small platoon up to your hotel room.
Where is the footage? Maybe the reason it is never released in cases like this is because at first, "the investigation is ongoing". And later, the investigation is over, but if they release it there would be a revolution. So, just try and forget about it, ok?