Cohen wasn't personally charged in the indictment. At a news conference to discuss the case, Bharara said insider trading was "rampant" at SAC and that it had become a "veritable magnet for market cheaters." The indictment against SAC is the most high-profile corporate prosecution in a decade and caps a seven year-long probe into the firm, considered one of the most profitable and powerful on Wall Street. Prosecutors also revealed insider-trading charges against portfolio manager Richard Lee, who pleaded guilty earlier this week to illegal trading in Yahoo! and 3M Corp. The complaint alleges that SAC hired Lee — not to be confused with Richard C.B. Lee, another SAC trader who has pleaded guilty — despite knowledge that he had a reputation for insider trading at a former firm. Sources identified that firm as Ken Griffin's Citadel. Katie Spring, a spokeswoman for Citadel, said Lee was terminated for cause in 2008, but that it not tied to insider trading.