Looks like former Enron executive J. Clifford Baxter knew too much. See the CNN article:
Former Enron executive dies in apparent suicide .

J. Clifford Baxter was found dead at 2:23 a.m., said Pat Whitty of the Sugar Land Police. Sugar Land is about six miles southeast of Houston.

"Baxter had an apparent self-inflicted gunshot wound to the head," Whitty said. "He was discovered inside a vehicle ... A suicide note was found at the scene. There was no sign of foul play. Inside his wallet was an ID indicating he was an employee of Enron."

The contents of the suicide note were not disclosed.

During an afternoon news conference, Sgt. Truman Body of the Sugar Land Police said an autopsy has been ordered. Body also said that a revolver had been found inside the car.