sentences:  The attack was attributed to the bandit and separatist leader Salvatore Giuliano.Nevertheless, the Mafia was suspected of involvement in the Portella della Ginestra massacre and many other previous and subsequent attacks.On September 14, 1948, a Parliamentary commission of inquiry into the public security situation on Sicily (Commissione parlamentare d'inchiesta sulla situazione dell'ordine pubblico) was proposed by deputy Giuseppe Berti of the Italian Communist Party (PCI) in a debate on the violence in Sicily.