Enron has always been a somewhat shady, sleazy company. When that one CEO quit suddenly after only a month or two on the job (ostensibly because he wanted to spend more time with his family!), it was apparent that there was more to it than that. He must have seen what was going on and wanted to leave before the "bin laden" hit the fan.
Jeff Skilling (CEO) quit after 6 months on the job, though he was groomed for the position for 10 years, and probably played a big role in all the funny money loan deals they made.
The week before he quit in August, thee was an explosion near London at the Teeside Power plant, owned by Enron. Tow employees were killed, both with families of small kids. When he resigned the following week, he had the audacity to sight their deaths as his 'realization that life is to pprecious to work so hard'.
It was obvious that the real vision was "life is to precious to pend it in jail." He defintely was a sleazy, low character type.