Tom Winter, a reporter with NBC, said Tuesday morning that Richardson and three others, including USC assistant Tony Bland, have been arrested by the FBI as part of the probe.

In June and July, Richardson accepted $20,000 in cash bribes during meetings in New York and New Jersey with undercover agents and co-defendant Munish Sood, founder and CEO of the Princeton Advisory Group, an investment services company, according to the complaint.

A month later, Dawkins told an undercover agent that Richardson needed another $15,000 to secure the player, who he identified as a "top point guard in the country," according to the complaint.

These file photos show, assistant basketball coaches Tony Bland, left, Chuck Person, center, and Arizona's Lamont "Book" Richardson.

The New York native helped recruit many East Coast players to Arizona, including former Wildcats standouts Mark Lyons and Kevin Parrom.