I have a feeling there is a lot more to this story than some disgruntled gambler. This seems like the guy knew what he was doing. Put a lot of planning. Could have had help from other people.
The guy was loaded. He owned several planes and houses.
His hotel room had anywhere between 10-20 firearms. Some being on the high end like Daniel Defense DDM4 (MSRP $1850) with some quality optics.
Also I counted about 15-16 Surefire 100 round magazines (MSRP $170 each.) a small fortune in itself.
Also he rented 2 rooms, one of which was a really huge suite, he also had multiple cameras set up both in the room and in the hallway.
To move that many long guns in un-noticed it would of taken days. This wasn't just a spur of the moment type thing. He had time to calm down and rethink what he was doing. He wanted to do this.
The hotel was also a gun/weapon free zone so he had to be discreet.
No amount of laws would of stopped this. Dozens were broken in the process. Laws mean nothing to a man with money and a death wish. That is what scares people. Criminally and Mentally he had no prior history.
Some people have demons inside of them that are more terrifying that any creature of fiction.
If the fertilizer bomb thing is true, we are lucky he didn't load up one of his private planes with explosives.
I feel so terrible that so many people were injured and killed. It was a very senseless act.