There are at least ten other suspects, in addition to the 25 indicated in the order, in the investigation that led to the arrest of the president of the Liguria Region Giovanni Toti. Among these Paolo Piacenza, extraordinary commissioner of the Port System Authority of the Western Ligurian Sea since 8 September 2023 after Signorini had become CEO of Iren. He is under investigation for abuse of office. The offices and residence in Piacenza were searched by the financial police.
The matter for which Piacenza is under investigation concerns the tariff increase granted by the then president of the AdSP, Paolo Signorini, to the company of Mauro Vianello, owner of 54.19% of the shares of the company Santa Barbara Srl, active in the business sector relating to transport and communications and specialized in Fire Prevention, Surveillance and First Response services within the port of Genoa. According to the investigators, following a provision that ordered the increase in the hourly rate for the provision of the supplementary service of the Santa Barbara Srl Company, Signorini received expensive money and gifts from Vianello.
But in the investigation papers Piacenza also appears because, as the investigating judge Paola Faggioni writes: «During the investigations, the full awareness on the part of Signorini, Piacenza and the officials of the Port Authority emerged of the illegal occupation by Spinelli of the area of the ‘Ex Carbonile Levante Nord e Su
