Americans bet about $165 billion a year, but here’s something Tim O’Brien worries about: When there’s billions of dollars on the line, how likely is it that your favorite sport is going to get corrupted? Gamblers and criminals have been trying to rig games since the Olympics first began – it still goes on all the time if you look for it. Enter SportRadar, where former intelligence operatives, police detectives, journalists, and computer geeks track 500,000 sporting matches around the world every year, on the hunt for potential fixes.

This is the second of three episodes about the past, present, and future of the multi-billion-dollar sports betting boom, and its impact on games, fans, and society. The series will take you from Chicago to London to the tribal lands of Connecticut to learn more about the rise of mobile betting and match fixing, and the future of tribal casinos.