Boston University's Mitchell Zuckoff says no one knows when he went from being a legitimate money manager to a guy running an alleged Ponzi scheme.

NPR: Ponzi Schemes Have Colorful History

Professor MITCHELL ZUCKOFF (Journalism, Boston University): A guy who preceded him, who was pretty well known in his day, was a guy named Franklin Miller, who was known as 520 percent Miller.

NPR: Ponzi Schemes Have Colorful History

Professor MITCHELL ZUCKOFF (Journalism, Boston University): It's stunning.

NPR: Madoff's Alleged Ponzi Scheme Scams Smart Money