 Contorno was in contact with De Gennaro prior to his arrest, who tried to monitor his movements.In April 1994, a powerful bomb was discovered close to the secret hideout of Contorno near Rome in the midst of a campaign of the Corleonesi against state collaborators.In January 1997 Contorno was arrested again, because of his involvement in dealing 2 kilograms of heroin in the early 1990s, which resulted from the investigations into the bombing attempt.