But like Fastow, Kreinberg may be the little fish being used to catch a bigger prize.
Kreinberg's crimes were nowhere near as large as Fastow's, and neither is his punishment.
So Mr Fastow's cooperation may spell trouble for his former bosses, Kenneth Lay and Jeffrey Skilling.
But certainly a dark thrill ran through onlookers as Andrew Fastow took the stand.
Last week, Andrew Fastow was released from federal prison to a halfway house.
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Former Enron CFO Andrew Fastow takes the witness stand and buries ex-boss Jeffrey Skilling.
Petrocelli skewered Fastow as a thrall to "insatiable greed"--and the disgraced ex-CFO squirmed.
The defense will argue that Fastow's thievery was the only illegal activity in Enron's history.
That helped keep the charade going until news of Fastow's off-the-books paychecks emerged in 2001.
Fastow's job was to confirm those previous reports--and drag Lay into the same circle of knowledge.
Prosecutors don't have to show Lay took an active role in Fastow's schemes, Carney said.
Mr Fastow may have decided to come clean only after a period of questioning.
Likewise, Mr Fastow, the government's star witness, accepted a ten-year jail sentence under a plea bargain.
Mr Skilling's defence team unearthed another apparent inconsistency in Mr Fastow's testimony that resonates with today's events.
Having at first declined to co-operate, Mr Fastow's resolve weakened with the indictment of his wife last May.
Fastow's history of abusive antics and sharp temper will also be in full view, clouding the jury's judgment.
The composite summary appears to confirm that this was what Mr Fastow told the FBI from the start.
Several former executives have already been charged and sentenced, including Andrew Fastow, the company's former chief financial officer.
As once-upon-a-time CFO, Fastow was the highest-ranking exec to have copped a plea.
Enron's defrocked CFO, Andrew Fastow, is the unlucky winner of the longest sentence handed out in the postboom scandals.
Skilling Lawyer Daniel Petrocelli began with an assessment--and an assumption--about Fastow's own nature.
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Another line of defence is expected to rest on Mr Fastow's self-enrichment from off-balance-sheet partnerships that dealt with Enron.
Mr Fastow testified that there were, and that Mr Skilling was behind them.
Mr Fastow came forward for arrest in October, following the guilty plea of his former right-hand man Michael Kopper.
Amazingly, Mr Fastow's position in the partnerships was approved by Enron's own board.
Fastow had said that in an Aug. 15, 2001, meeting, he vowed his loyalty to Lay and to the firm.
In other words, Enron went bankrupt because Mr Fastow was a crook, not because it was a house of cards.
Besides the LJMs, Fastow also discussed financial mechanisms called Raptors--curiously sharing a name with the ruthless, carnivorous beasts of Jurassic Park.
They were coerced and pressured by an overzealous investigation, as Dan Petrocelli, Fastow's ubiquitous lawyer, has stated in no uncertain terms.
It's the sixth week of the Enron trial--and the second day of testimony from former Chief Financial Officer Andrew Fastow .
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