To clarify- and maybe some of this is wrong, I am pulling from memory, but was intensely interested at the time-
The guy was so far outside the usual loser profile-- older, girlfriend, wealthy to the tune of 5 million, unknown source of funds, pilot, apparently owned a couple aircraft at one time, one of which was reportedly leased to the feds, amassed a large gun collection for some reason after Trump was elected, his girl friend who was involved (I think with ammo purchase) ran off to the PI right before or after(can't remember), the bellhop shot inside the hotel does an interview on TV and goes south , there was info his girl friend had been an federal asset, etc.
I can't remember every detail, but the oddities were everywhere. Like his house being robbed after the event when it was a crime scene. The hard drive disappearing from his computer. Do we even know he was the shooter? It bore no similarity to any other mass shooting I can recall.
I am not a big conspiracy nut but this thing reeked of weirdness. I have wondered if it was a "fast and furious" gun control effort designed to gin up support for bans. Certainly the leo's were keeping a tight lip- took a year for the report to be released, people pretty much had forgotten by that time.
Why? Why bring a few dozen EBR's up to a hotel room , risking discovery? Almost like the method was the message. Did he think he was going to wear them out, or was a display being prepared?
These things almost always have a trail- a statement, social media rants, odd friends, something. People who figure they are going out in blaze usually want to let the rest of the world know how wronged they were. This guy was the original gray man.
Things get weird, and weird stuff happens. But even weirdness has a pattern. This had none- and that is strange. Like the fact there seems to be very little backstory on the guy.
Oh well, probably we will never know. Like walking down the road and knowing there is a dead creature in the brush. Can't see it, don't know what it is, but something stinks.