Borsellino failed to get himself appointed to the investigation into Falcone's murder. At a public meeting on 25 June 1992, he said that he had certain information which might explain why Falcone was killed. Borsellino unofficially asked Carabinieri Colonel Mario Mori to resume a previous investigation by Falcone into Mafia control of public works contracts. However, Mori, unbeknownst to Borsellino, was involved in secret meetings with Vito Ciancimino, who was close to Riina's lieutenant Bernardo Provenzano. Mori was later investigated on suspicion of posing a danger to the state after it was alleged he prevented the arrest of Provenzano and had taken a list of Riina's demands that Ciancimino had passed on. He maintained he had spoken to Ciancimino to further investigation of the Mafia, that Ciancimino had disclosed little beyond implicitly admitting he knew Mafia members, and that key meetings were after Borsellino's death. In 2014 Italy’s president, Giorgio Napolitano, testified in a trial in which 10 defendants including the former interior minister, Nicola Mancino, were accused of negotiating with the Mafia.