By the 1990s, Previte, an old-school workhorse, found himself answering to younger mob bosses like "Skinny Joe" Merlino, who seemed increasingly spoiled, cocky, and careless. Convinced that the honor of the "business" was gone, he became the FBI's secret weapon in an intense and highly personalized war on the Philadelphia mob. Operating with the same guile, wit, and stone-cold bravado that had made him a force in the underworld—and armed with only a wiretap secured to his crotch—Previte recorded it all; the murder, the mayhem, and even the story of mob boss Ralph Natale's affair with his youngest daughter's best friend. Previte and his FBI cronies eventually prevailed, securing the convictions of his nemeses, "Skinny Joey" Merlino and Ralph Natale.