French investigators have caught two casino cheats in the Paris suburb of Enghien-les-Bains who allegedly used a sophisticated technique to fraudulently win tens of thousands of euros per evening. In order to gather evidence on the two men, investigators first installed an elaborate surveillance system in the casino, France Info reported on Friday, citing the police. This enabled them to establish that one of the perpetrators used a tiny earpiece at the poker table that was so small that it had to be removed with a magnet. The fraudster received instructions via the earpiece, from an accomplic…