He's partied with celebrities and sports stars, rising to the top of one of the most famous strip club empires worth millions of dollars.

But he was also scared to death because he was also the point man on an inside job that would bring down some of the most notorious Mafia figures of all time.

Who is he? You'd never know by looking at him.

"I'm not a strong, tough guy," says Michael Blutrich. "I mean, if someone wants to come after me, they'll get me."

Scores: How I Opened the Hottest Strip Club in New York City, Was Extorted out of Millions by the Gambino Family, and Became One of the Most Successful Mafia Informants in FBI History, by Michael D. Blutrich