Joseph "Joey" Cantalupo (born 1943) was an American Mafia associate from the Colombo Crime Family and later a government informant.
Informant Cantalupo turned informant in 1972 and was a considerable asset to the FBI in prosecuting mafia trials.
He has testified in court, written a book on his activities in organized crime and also appeared in mafia related documentaries (such as Crime Inc.) as an authority on mafia life."Crime Inc The True Story of the Mafia Part 1 All in the Family"
References
https://www.nytimes.com/1986/09/30/nyregion/informer-calls-persico-colombo-boss.html