A look at how one investigator spent ten years trying to expose Bernie Madoff's massive Ponzi scheme that scammed an estimated $18 billion from investors. A look at how one investigator spent ten years trying to expose Bernie Madoff's massive Ponzi scheme that scammed an estimated $18 billion from investors. A look at how one investigator spent ten years trying to expose Bernie Madoff's massive Ponzi scheme that scammed an estimated $18 billion from investors. A look at how one investigator spent ten years trying to expose Bernie Madoff's massive Ponzi scheme that scammed an estimated $18 billion from investors.