Well like they say in the Movie Casino mob don’t like no witnesses LOL!
Aerial video showed no apparent damage to the parking structure, where entrances were blocked while police, firefighters and federal Bureau of Alcohol, Tobacco, Firearms and Explosives agents investigated.
In the modern corporate casinos of Vegas, there are Big Brother eyes watching all (and running identity checks against those entering the casinos).
Even off the strip in the small neighborhood bars (with gambling) you will find a posted requirement to "remove your sunglasses".
There are witnesses off site all over Vegas.