pentito /pɛnˈtiːtəʊ/ noun1 •A criminal who cooperates with police or government authorities and testifies against or provides harmful information on fellow criminals; a turncoat or informant, usually a former Mafioso.According to a pentito in the 2004 DDA investigation, 50 percent of the shops in Naples alone are actually run by the Camorra. — 2007 formspentiti