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Ken Lay might recall (and if he does not he can refer to old newspaper archives) that it was the market that refuted the Enron corporate model, not prosecutors. Prosecutors just picked up the pieces of a fraud so that victims of the fraud known as Enron could see justice done, and perhaps recoup some losses.
For Ken Lay to make this into prosecutorial terrorism shows just how disconnected from reality he is. This might just be a public relations balloon to defend himself and his colleagues: it is long enough for people to forget the misdeeds; and his appearance of insanity might get his colleagues off the legal hook. His appearance of insanity certainly won't land him at the helm of a corporation larger than a 7-11 franchise for the remainder of his life.