D'Amico's cooperation which came one year later than that of Pasquale Barra, was viewed by the Justice department as extremely valuable because it enabled the Department to cover the latest period of the NCO's activities, especially its response to the 1983 crackdown by the Italian government. D'Amico would testify against Cutolo and numerous NCO members during the three-year-long Maxi Trials. His testimony along with those of Giovanni Pandico, Pasquale Barra, Mario Incarnato, etc. were found reliable and convincing enough to become a significant factor in the convictions of more than 800 defendants. However, many of the pentiti's allegations were proved to be fabrications and several of the convicted defendants were released.
