Montiglio was born in New York City to Anthony Santamaria and Marie Gaggi, both of Sicilian origin.
[1] In 1967, Montiglio served in the Vietnam War as a sniper who reportedly killed dozens of men (unconfirmed).
[1][2] Upon his return from Vietnam, he started working for the Gambino family in drugs, extortion and murder, reportedly earning $250,000 per week at his peak in the Roy DeMeo crew.
[3] He testified against the family and Gaggi in various trials, and reportedly helped send 56 mobsters to prison.
[6] On June 27, 2021, Montiglio died at the age 73 in Albuquerque, New Mexico, and is buried at Santa Fe National Cemetery.