I actually have had some time to think about it, and if I were the FBI, I would be fully on a “follow the money” path right now. This is a retired guy with seemingly endless money to gamble with as well as a freaking arsenal who also lived in Nevada.
Maybe he simply bought a lot of land in California and Arizona in the 80s and made a killing later in life.
At that point, I don’t even know where to start looking.
Following the money takes time. People want answers now!
Personally, I'm waiting for the true story to emerge. I think it's going to be interesting.