Known as Don Stefano to his friends and The Undertaker to others, he was also a charter member of the American Mafia's ruling council, The Commission.

After the murders of Stefano and Giuseppe, their younger brother, Salvatore (the father to Joe Bonanno), took revenge by killing members of the Buccellatos.

[3][4] The eldest daughter Josephine married Charles Montana, the nephew of Buffalo mobster John C.

[7] In August 1921, a barber named Bartolo Fontana turned himself into the New York police, confessing to murdering Camillo Caiozzo a couple of weeks earlier in Avon, New Jersey.

He was welcomed by Willie Moretti and an unidentified man, it was later revealed that Magaddino was responsible for bailing him out as a favour for Giovanni Bonventre, Bonanno's uncle.

Magaddino's crime family held power in the underworld territories of Upstate and Western New York, namely, Buffalo, New York, bordering Canada and situated on Lake Erie, Rochester and Utica, along the Mohawk River as far east as Amsterdam, New York; from Eastern Pennsylvania as far west as Youngstown, Ohio, and in Canada from Fort Erie (opposite Buffalo) to Toronto, Ontario and as far east as Montreal, Quebec.

Due to his territory's remoteness yet the vast amount of it he controlled and being geographically insulated from the inter-family squabbles of the New York City-based families, he was held in high regard and was at times called upon to be an arbiter involving territorial disputes between crime families based there.

[18][19] It is believed Magaddino, along with Antonio and Johnny Papalia, played a role in notorious Hamilton bootlegger Rocco Perri's disappearance in 1944 in order to gain more Canadian market control.

[20] After Perri's disappearance, three of his former lieutenants, in addition to Papalia and Giacomo Luppino, began answering to Magaddino in Buffalo: Tony Sylvestro, Calogero Bordonaro and Santo Scibetta, known as the "three dons".

[23] In 1963, Joseph Bonanno made plans to assassinate Maggaddino and several rivals on the Mafia Commission, bosses Tommy Lucchese, Carlo Gambino, as well as Frank DeSimone.

[25] Magliocco was assigned the task of killing Lucchese and Gambino, and gave the contract to one of his top hit men, Joseph Colombo.

Fearing for his life, Bonanno fled to Canada, leaving Magliocco to deal with the Commission, but was deported back to the United States.

"[27] Magaddino died of a heart attack on July 19, 1974, at age 82, at Mount Saint Mary's Hospital in Lewiston, New York.