Andrew Fastow

Fastow, seen as one of the chief architects of using off-book partnerships to conceal billions of dollars of losses and debt, pled guilty to securities and wire fraud in 2004 and was sentenced to six years in prison. His wife, Lea, also worked at Enron, where she was an assistant treasurer; she was sentenced to a year in prison. Fastow last year said he accepted full responsibility for his actions and considers himself “probably the person most responsible for Enron’s failure” after originally viewing himself as a “hero.” Fastow, who's now a public speaker on business ethics.