During 1672, which the Dutch refer to as the disaster year, France and England attacked the Republic in the Franco-Dutch War. De Witt was severely wounded by a knife-wielding assassin on 21 June. He resigned as Grand Pensionary on 4 August, but this was not enough for his enemies. His brother Cornelis (who was deputy-in-the-field for de Ruyter at the Raid on the Medway), particularly hated by the Orangists, was arrested on trumped-up charges of treason. He was tortured (as was usual under Roman-Dutch law, which required a confession before a conviction was possible) but refused to confess. Nevertheless, he was sentenced to exile. When his brother went over to the jail (which was only a few steps from his house) to help him get started on his journey, both were attacked by members of The Hague’s civic militia. The brothers were shot and then left to the mob. Their naked, mutilated bodies were strung up on the nearby public gibbet, while the Orangist mob ate their roasted livers in a cannibalistic frenzy. Throughout it all, a remarkable discipline was maintained by the mob, according to contemporary observers, lending doubt as to the spontaneity of the event.

https://en.wikipedia.org/wiki/Johan_de_Witt