His father Antonino Montagna is still a prominent mafioso in CDG.
In short, when an American needed something, he was the one they turned to. Meanwhile, because of Don Ciccio Domingo's relatives. The aunt, Angela Domingo, was married to a member of the Maranzano family (Salvatore Maranzano was the first Italian American mafia boss originally from Castellammare del Golfo, killed in New York on 10 September 1931). And again: Domingo is the "godson" of Antonino Giuseppe Montagna, father of Salvatore Montagna believed to be at the top of the Bonanno family, headed by Maranzano's successor, Joseph Bonanno, murdered on 24 November 2011 in Montreal.