"We last looked at the admission's examination about six years ago and it would be a dereliction of duty not to review it again now and that's what we're doing, " Mr Appleyard said.

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During cross-examination, prosecutors pried the admission out of Skilling that he had invested in his girlfriend's photo company when it derived the bulk of its revenue from Enron, and that he failed to disclose this conflict to the board of directors.

FORBES: Enron: Final Sale

It was only during a second admission to the hospital on 20 March that an endoscope examination identified a problem.

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It was the Morning News' questions about persistent rumors of pyrotechnic devices that led to a re-examination of the record and Reno's admission.

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