The Mafia felt betrayed by Lima and Andreotti. In their opinion they had failed to block the confirmation of the sentence of the Maxi Trial by the Italian Supreme Court in January 1992, which upheld the Buscetta theorem that Cosa Nostra was a single hierarchical organisation ruled by a commission and that its leaders could be held responsible for criminal acts that were committed to benefit the organisation. The Mafia counted on Lima and Andreotti to appoint Corrado Carnevale to review the sentence. Carnevale, known as "the sentence killer", had overturned many Mafia convictions on the slenderest of technicalities previously. Carnevale, however, had to withdraw due to pressure from the public and from Giovanni Falcone – who at the time had moved to the ministry of Justice. Falcone was backed by the minister of Justice Claudio Martelli despite the fact that he served under prime minister Andreotti.