He had manufactured an explosive envelope by Giuseppe Sciacca, a 40-year-old milanese militant anarchist from Catania, who had sent it to Ladisa Ristorazioni on 8 March 2016, to the address of the Igeam headquarters in Rome. But it is also suspected for that delivered to the Crea of Ravenna – a company specialized in industrial security – which had the same characteristics. These are companies that were targeted by anarchists because they collaborate with CIEs / CPRs, temporary detention centers for migrants.To betray Sciacca were traces of sweat from which the scientific police managed to trace his DNA: they were on the side of a 9-volt battery, the envelope would explode with the opening of the envelope. The trigger was made using a halogen bulb with a broken glass bulb connected to an explosive charge with 22 grams of pyrotechnic powder. The Digos attributes to him the role of expert packager of the bombs, which were all made in the same way. Sciacca, according to investigators, was in Turin when the bomb package was delivered to the mayor Chiara Appendino, on 1 April last. And he was also arrested and reported on March 30th because he was among the group of violent demonstrators who protested against the eviction of the former occupied asylum, intercepted in Via Aosta and then found in possession of an arsenal.
His name was already known to the police: he had in fact been sentenced for the launch of two explosive devices against the municipal police command of Parma on October 20, 2008. Investigators consider it an element of "prominence" of anarcho-insurrectionalism Italian. And his arrest is the corollary of the "Scintilla" operation that led to precautionary measures against 6 anarchists for 21 attacks: 15 with explosive parcels sent to companies involved in supporting the management of centers for repatriation and 6 with bombs positioned in front of post office ATMs in Turin, Bologna and Genoa.
The search that took place in the Cerro Veronese farmhouse where he lives with his partner, unrelated to the investigation, led to the discovery of two banners hanging as relics on the walls: "Fuoco alle galere" and "United by bad passions against repression, at loggerheads with the existing ".