Harry M. Markopolos (born October 22, 1956) is an American former securities industry executive and a forensic accounting and financial fraud investigator. From 1999 to 2008, Markopolos uncovered evidence that suggested that Bernie Madoff's wealth management business was a huge Ponzi scheme. In 2000, 2001, and 2005, Markopolos alerted the U.S. Securities and Exchange Commission (SEC) of his views, supplying supporting documents, but each time the SEC ignored him or gave his evidence only a cursory investigation. Madoff was finally revealed to be a fraud in December 2008, when his sons contacted the Federal Bureau of Investigation. After admitting to operating the largest private Ponzi scheme in history, Madoff was sentenced in 2009 to 150 years in prison.