Leonardo "Narduzzo" Messina (b. San Cataldo, September 22, 1955) is a former Sicilian mafioso who became a government informant or "pentito" in 1992. His testimony led to the arrest of over 200 mafiosi during the so-called "Operation Leopard" (Italian: Operazione Leopardo). Messina has implicated several politicians and government officials with ties to Sicilian Mafia, in particular Giulio Andreotti, seven times Prime Minister for Italy.
Born in San Cataldo, Caltanissetta, Messina was from a family of mafiosi going back a few generations. "I represent the seventh generation belonging to Cosa Nostra," he said. "I was affiliated not because I was a robber or because I was able to kill, but because I was bound to become a member by family tradition."
He left elementary school and became involved in burglary. He was imprisoned several times. In April 1982 after serving four years for armed robbery he eventually became a "man of honour" in the local Mafia family of San Cataldo. Messina became a close friend of Giuseppe Madonia, the boss of Vallelunga – one of the most important Mafia families in the province of Caltanissetta and an ally of the Corleonesi.
In 1984 he was arrested again for the killing of a drug dealer. He stayed in prison until 1989. After his release, he organized a drug trafficking ring for Giuseppe Madonia that covered several region in Italy. Madonia, in the meantime, had become the representative of the province of Caltanissetta in the Interprovincional Commission of Cosa Nostra.
Messina was arrested in April 1992 and decided to become a government informant (pentito). He was the first mafioso to start collaborating after the Capaci massacre in which judge Giovanni Falcone, his wife and three men of his police escort were killed. He said he was moved by emotional appeal of Rosaria Schifani – the widow of one the police escorts of Falcone – against the Mafia.