Two of his former subordinates pleaded guilty in February to charges of wire fraud and falsifying books and records.

BBC: Credit Suisse ex-trader Kareem Serageldin in court

Like Skilling, Lay has heaped the blame for Enron's spectacular failure on skittish investors, a whipsaw market and "the deceit of Andy Fastow"--the former finance chief who pleaded guilty to in January 2004 to wire and securities fraud, two of the 98 counts he'd faced, and agreed to a decade in the slammer.

FORBES: Lay Tells Enron Jury Of 'American Nightmare'

On Thursday, the U.S. attorney for the Eastern District announced the arrest of a former stock loan supervisor from Morgan Stanley and two former managers from Janney Montgomery and one other person on a variety of charges, including securities and wire fraud, money laundering and bribery.

FORBES: Feds Go After Stock Loan Scammers