More than 30 people including Portland Trail Blazers head coach Chauncey Billups and Miami Heat guard Terry Rozier were charged on Thursday as part of a sweeping investigation into illegal gambling, rigged poker games, and match-fixing in the NBA.

Federal prosecutors unveiled an indictment against more than two dozen defendants that outlined a nationwide scheme backed by organized crime families to run corrupt poker games and lure in victims by offering them a chance to play alongside figures including Billups, then a former player, and former NBA player and assistant coach Damon Jones.

Billups and Jones, who were known inside the ring as “face cards,” allegedly knew that the poker games had been fixed through the use of cheating technology such as X-ray tables and shuffling machines, prosecutors said.

A second indictment charged six defendants including Rozier with a criminal betting scheme using insider information and performance-manipulation to profit off NBA games.

Rozier was accused of telling people close to him that he planned to make an early exit from a 2023 game he was playing for the Charlotte Hornets in order for gamblers to hit the “under” on bets tied to his performance. The Wall Street Journal reported in January that Rozier was being investigated.

Prosecutors say that gamblers obtained insider information from several NBA players and coaches, including Rozier and Jones, and distributed that information through a network of bettors in order to profit from another half-dozen NBA games through March 2024.

Federal Bureau of Investigation director Kash Patel and other top prosecutors announced the charges in a Brooklyn press conference, portraying the matter as an insider-trading scandal for the NBA.

Several defendants appeared in both indictments, including Jones, who played alongside LeBron James and was hired by the Cavaliers organization during James’ second stint in Cleveland. Efforts to reach Jones’s agent weren’t immediately successful.

Rozier is due to appear in federal court in Orlando on Thursday afternoon, while Billups was arrested in Portland and will appear in court there, a spokesman for the EDNY U.S. Attorney’s Office said.

The Portland Trail Blazers didn’t immediately respond to inquiries Thursday. Rozier’s lawyer said they had been in communication with prosecutors and told the player was a subject, not a target of their investigation—until FBI agents tried to arrest him in a hotel Thursday at 6 a.m.

“They wanted the misplaced glory of embarrassing a professional athlete with a perp walk,” said the lawyer, Jim Trusty. “Terry is not a gambler, but he is not afraid of a fight, and he looks forward to winning this fight.”

The NBA has been dogged by gambling scandals for more than a year and had already seen Toronto Raptors forward Jontay Porter banned from the league for life for conspiring with gamblers to fix his performance in NBA games.

But Billups is by far the most prominent figure to be swept up in the federal investigation, having coached Portland since the 2021-22 season.

The charges significantly deepened a crisis for the league that first burst into the open when the Porter case emerged in April last year . He pled guilty to a criminal charge after faking injuries to manipulate his points total and hit the “under” on prop bets related to his individual performance in two NBA games in January and March 2024. He told a judge that he participated in the scheme “to get out from under large gambling debts.”

Prosecutors said a group of gamblers put large amounts of money on Porter scoring fewer points than expected, having arranged the whole thing in advance over text messages, and that several of them went to Atlantic City together to place the bets.

Those same prosecutors were investigating the possibility that some of the people who arranged for Porter to fix his performance had inside information that prompted them to bet large sums of money against Rozier, an NBA veteran, a year earlier, the Journal reported.

Rozier’s lawyer said that the NBA had investigated Rozier’s conduct in 2023 and determined that he had done nothing wrong.

Before he became the Trail Blazers’ coach, Billups, 49, carved out a Hall-of-Fame NBA career as a player. Known by the nickname “Mr. Big Shot,” Billups made five All-Star teams.

In 2004, he helped author one of the most famous upsets in basketball history. When the Detroit Pistons beat the Los Angeles Lakers—with Kobe Bryant and Shaquille O’Neal—in the NBA Finals, it was Billups who served as point guard and floor general. He was named the series MVP.

Jones, who played 11 NBA seasons for 10 teams, once called himself “the best shooter in the world.”