NBA coach Chauncey Billups and player Terry Rozier were arrested in a massive illegal gambling scheme involving organized crime families and rigged poker games, the FBI said Thursday.

NEW YORK (AP) — The stunning indictment that led to the arrest of more than 30 people, including Miami Heat guard Terry Rozier and other NBA figures, on charges of illegal sports betting has drawn new scrutiny of the booming business of professional sports gambling across the U.S.

Among the more than 30 charged in an illegal gambling conspiracy tied to NBA games was Terry Rozier, a former University of Louisville basketball star.

Portland coach Chauncey Billups was charged with participating in a conspiracy to fix high-stakes card games that were backed by organized crime families. Heat guard Terry Rozier is accused in a separate scheme to concoct fraudulent prop bets by exploiting insider information.

The FBI gambling arrests involving NBA players and coaches is the league’s worst nightmare, and what many observers expected when Silver decided to form a relationship with legal sports betting.