The Clan dei Casalesi is a special structure within the Camorra (Neapolitan mafia). The clan consists of 7 families whose organization is similar to that of the Sicilian Cosa Nostra . It is one of the most powerful mafia clans in Italy . According to the Naples anti-mafia prosecutor , the clan's annual turnover would be $30 billion . It controls the province of Caserta from its stronghold Casal di Principe, and is believed to be responsible for 686 murders between 1985 and 2004. The clan is one of the most powerful and influential criminal organizations in the world with approximately 150 to 160 leaders and 8,000 to 9,000 members.