Biotti was the presiding judge in the case brought by the widow of Giuseppe Pinelli against the police commissioner Luigi Calabresi . Calabresi had led the investigation into the Piazza Fontana bombing . Pinelli died in mysterious circumstances during a police interrogation following the bombing . On 27 May 1971 , Biotti was recused at the request of Calabresi 's lawyer , who claimed that in a private conversation Biotti had admitted that for career reasons he had already formed an opinion on the case . It was a claim that Biotti vehemently denied . Calabresi 's attorney sought the recusal when Biotti ordered that Pinelli 's body be exhumed . Neither Biotti nor his two fellow judges were convinced that Pinelli had died from falling from the police station window . His forced recusal not only prevented the exhumation of Pinelli 's body , but delayed the investigation for two years
Piazza Fontana bombing
Piazza Fontana bombing
Carlo Biotti