Software engineer Ron Harris came up with an ingenious way of winning big on the slots, that didn’t involve anything immediately suspicious or risky. While by days his role was (ironically) that of a software engineer writing anti-cheating software for the Nevada Gaming Control Board, what he also did was to program the machines to pay out in the event of a very specific occurrence.
The trick involved inserting coins in a specific order that would then automatically tell the slot machine to pay out its jackpot. He rigged dozens of machines, and then moved on to bringing in accomplices to play for him. People get greedy and this additional involvement of others was his downfall. One of his accomplices was caught, which then led directly to Ron Harris. He served seven years in jail.