On 5 May 1980, Giuliano's successor in investigating the heroin network, Carabinieri captain Emanuele Basile, was killed. The next day, the prosecuting judge Gaetano Costa signed 55 arrest warrants against the heroin-trafficking network of the Spatola-Inzerillo-Gambino clan. From Sicily heroin was moved to the Gambino crime family in New York, who were related to the Inzerillos. Chinnici appointed Falcone to investigate the case, one of the biggest Antimafia operations in more than a decade. Costa signed the indictments after virtually all of the other prosecutors in his office had declined to do so – a fact that leaked out of the office and eventually cost him his life. He was murdered on 6 August 1980, on the orders of Inzerillo. Falcone was given bodyguards the next day.