When I went to work for the casino the BG check was equivalent to top secret... FBI did it, I filled out a stack of forms asking for my entire life... area I was in I had access to the programming of the slot machines, access to hundreds of thousands of dollars, access to the top secret security room because I took care of their wiring and monitors... best memory at the casino was New years eve having to drop the bills out of a $100 slot machine, I carried $122k back to the count room so it could be bagged. I had 4 armed guards surround me and had people asking if I was being arrested lol. That was the largest amount of cash I have ever had my hands on. More common would be to drop $5-10k out of the $1 slots so the bill acceptor would work again.
I still keep up my gaming license with the state of MN, and I am banned form playing in all of the casinos because of what I know about the slots! And no I cannot tell you what I know, I had to sign a LOT of confidentiality agreements to access the manufacturer data!