It's a Thursday night at Hollywood Casino at Penn National - a day when gamblers will wager nearly USD 5 million on the glitzy new slot machines - and a payout machine breaks down. As a technician wheels a repair cart onto the floor and opens up the machine, Trevor Hassenbein watches from an eye in the ceiling. He's an enforcement agent with the state Gaming Control Board, and he's looking over the shoulders of Penn National's four-person surveillance team...