We collect video evidence and then forward it to a gaming inspector who then gives us authorization to call the police, and then they're charged with theft. This takes a little while so we have to pretend like we don't know they're cheating so that we can have them arrested before they run out the door.  I've only ever been involved in the process once, though. People usually don't outright cheat, they'll do what's called "advantage play" which isn't technically illegal. Like card counting, for instance. So when we suspect that they're doing so we'll either take steps to prevent it or we'll just kick them out. I actually had to learn how to count cards as part of my training. But honestly card counting is easily spotted and doesn't make that much of a difference to the house edge, so we don't worry about it that much. I had to take a course that went through all the various types of advantage play and it was quite eye opening. If I wanted to I could probably travel around to shitty casinos and make a living off of it, but it's a fucking grind and generally you have to get a team of guys together to do it. Plus it just seems like a shitty way to earn a living.