"It was like watching an old lady get mugged on the street," she says. "I thought, 'I can't sit by any longer.'"

Fleischmann is a tall, thin, quick-witted securities lawyer in her late thirties, with long blond hair, pale-blue eyes and an infectious sense of humor that has survived some very tough times. She's had to struggle to find work despite some striking skills and qualifications, a common symptom of a not-so-common condition called being a whistle-blower.

Fleischmann is the central witness in one of the biggest cases of white-collar crime in American history, possessing secrets that JPMorgan Chase CEO Jamie Dimon late last year paid $9 billion (not $13 billion as regularly reported – more on that later) to keep the public from hearing.

Back in 2006, as a deal manager at the gigantic bank, Fleischmann first witnessed, then tried to stop, what she describes as "massive criminal securities fraud" in the bank's mortgage operations.