PI: Mob Took Down Spitzer

A new epilogue to the best-selling book King of the Club suggests that Eliot Spitzer’s political and personal downfall was payback by the mafia, the New York Post reports. "I think it's the Gambinos," a private eye tells CNBC's Charles Gasparino in his book’s paperback edition.

Writes Gasparino: "Spitzer's hooker girlfriend, Ashley Dupre, apparently had some friendship with someone alleged to be one of the family's associates. Spitzer had made cases against the mob early in his career as a prosecutor, so in Dietl's mind, why wouldn't the crime family rat out a rat?" (Read more Eliot Spitzer stories.)