DIA was established with the law decree n. 345 of 29 October 1991, following the intensification of the fight against the Sicilian Mafia in Italy, just before the killing of magistrate Giovanni Falcone, the main inspiration and promoter, and was created with the urgent decree during the Andreotti VII government and Italian Minister of Justice Claudio Martelli as a police multy-force body (Carabinieri, Polizia di Stato e Guardia di Finanza).