Yvan Colonna was a Corsican nationalist convicted for the 1998 assassination of the prefect of Corse-du-Sud, Claude Érignac. He was beaten to death in prison by a Cameroonian-born inmate for "disrespecting Muhammad", sparking riots. From Wikipedia
A court found the prison administration's negligence contributed to the fatal 2022 attack on the Corsican militant by a radicalized inmate.
