Part II: Table Game Cheating · Roulette Cheating Methods

Scam #7: The Magnetic Roulette Ball (Remote-Controlled Ball)

How it works

This sophisticated cheat involves replacing the casino’s standard roulette ball with a ball containing a magnetic core (often steel or ferromagnetic material). A confederate — either a dishonest dealer who introduces the ball into play, or a player who switches balls during a distraction — places the magnetic ball on the wheel. An accomplice concealed nearby operates a hidden electromagnet or radio-frequency device that can influence the ball’s trajectory as it slows. In one documented variation, a team used a powerful leg-mounted electromagnet (weighing approximately 25 pounds) hidden under baggy pants to pull the ball toward a target sector. The magnet’s polarity could be reversed or pulsed to either attract or repel the ball at critical moments. The scam can achieve approximately 90% accuracy in directing the ball to a target six-number range under ideal conditions.

Where it appears

All roulette variants; requires inside access to introduce the ball

On the record

The Monique Laurent Case (1973): Monique Laurent, her husband, and her brother (a croupier with radio technology expertise) used a modified roulette ball with a radio receiver inside. Monique operated a transmitter disguised as a cigarette pack from the audience. Her husband bet on a specific six-number range. The system achieved ~90% accuracy, earning them roughly 5 million French francs in one week before their glamorous lifestyle attracted attention and they were caught. The case inspired the French film “Les Tricheurs.” The Austrian Casino Case (2003): A gang won approximately $700,000 from an Austrian casino using a remote-controlled magnetic ball. The scam was discovered when the dealer picked up the ball and it stuck to his cufflink.

Published as a detection reference for surveillance, compliance and gaming-operations professionals. Thresholds and tuning are set by the property. Nothing here is instruction — the method is described so it can be recognised.