Every story must have its hero as well as its villain, and this week it was the turn of Enron's whistleblower, Sherron Watkins, to tell Congress who were the guilty men.

BBC: At the Enron hearings

But Sherron Watkins was a different story: In the moral sense, an unimpeachable witness, Watkins took the stand in March, claiming that she'd warned Lay and other top execs of impending problems at the firm.

FORBES: Whistleblower Watkins Vindicated By Enron Guilty Verdicts

It just took Sherron Watkins .

FORBES: Magazine Article

Sherron Watkins: It really is.

FORBES: Mind On The Money: The Dodd-Frank Whistleblower Provisions

From Mark Koenig to Sherron Watkins to Ben Glisan and, of course, Andrew Fastow, the jury received testimony that Lay and Skilling were well aware of grave financial problems at Enron, and that they participated in fraud or at least did nothing to prevent it.

FORBES: Case Closed For Lay, Skilling

Defense attorneys have been able to cast a slim shadow of doubt on even the seemingly impervious whistle-blower Sherron Watkins , who memorably submitted a memo stating that "Enron will collapse in a wave of accounting scandals, " and former Treasurer Benjamin Glisan , who as it turns out received favorable treatment while in prison.

FORBES: Game On For Lay, Skilling