Following the death of Giuseppe Pinelli the radical left - wing newspaper Lotta Continua started a campaign accusing police officer Luigi Calabresi of Pinelli 's murder .
Giuseppe Pinelli mysteriously died on 15 December while in police custody .
Following the death of Giuseppe Pinelli , who mysteriously died on 15 December while in police custody , the radical left - wing newspaper Lotta Continua started a campaign accusing police officer Luigi Calabresi of Pinelli 's murder .