Finally, in the summer of 1983, one of his godsons, Nicola Mazzo, aka " "'o Carusiello " " ( The Cabman ) showed him a letter by Cutolo in which Cutolo claimed that he was willing to sacrifice seven of his best men, among them D'Amico, in exchange for a peace treaty with the NF . Astounded by this high level of treachery that was being perpetrated by Cutolo, D'Amico decided to collaborate with Italian Justice on September 27, 1983.