U.S. Army Special Forces Master Sergeant Gannon Van Dyke has been charged with illegally earning over $400,000 by using classified military information to place bets on Polymarket. The charges relate to bets concerning the arrest of Venezuelan President Maduro. Van Dyke's attempt to open an account on Kalshi was denied due to failed identity verification and KYC checks. Polymarket reported Van Dyke's suspicious transactions to law enforcement and has cooperated fully with the investigation. This case marks the first major insider trading criminal case in the prediction market sector, raising concerns about insider trading risks on such platforms.