Feb. 4 - Lay resigns from the board.
Feb. 7 - Skilling, Fastow, Michael Kopper appear at Congress with McMahon and in-house Enron lawyer Jordan Mintz. Skilling testifies; Fastow and Kopper invoke Fifth Amendment rights.
Feb. 12 - Lay invokes Fifth Amendment at a Senate hearing after expressing "profound sadness" at Enron's collapse.
March 14 - Former Enron auditor Arthur Andersen LLP indicted for destroying Enron-related documents to thwart investigators.
April 9 - David Duncan, Andersen's former top Enron auditor, pleads guilty to obstruction for instructing his staff to destroy documents as per company policy.
June 15 - Andersen convicted.