Ronald Dale Harris

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Ronald Dale Harris is a computer programmer who worked for the Nevada Gaming Control Board in the early 1990s and was responsible for finding flaws and “gaffs” in software that runs computerized casino games. Harris took advantage of his expertise, reputation and access to source code in order to illegally modify certain slot machines to pay out large sums of money when a specific sequence and number of coins were inserted. From 1993 to 1995, Harris and an accomplice, John O'Connor stole thousands of dollars from Las Vegas casinos, accomplishing one of the most successful and undetected scams in casino history.

Towards the end of his stint, Harris shifted his focus to the probability game Keno, for which he developed a program that would determine which numbers the game's pseudorandom number generator would select beforehand. When Harris's accomplice, John O'Connor, attempted to redeem a high value winning keno ticket at Bally's Atlantic City Casino Hotel in Atlantic City, New Jersey, casino executives became suspicious of him and notified New Jersey gaming investigators. The investigation led authorities to Harris and after a trial was sentenced to seven years in prison. He was released from prison after serving 2 years.

Currently, he is back in Las Vegas, working for a publishing company. He is listed in the Nevada Gaming Control Board's black book and prohibited from entering casinos.

Harris’s story can be seen on the History Channel and Discovery Channel program Breaking Vegas, which features interviews and reenactments of some of Harris’s memorable moments in his casino-breaking scheme. The Travel Channel's Vegas Cheaters Exposed also briefly explains his story.