In the Constituent Assembly he opposed every step towards the destruction of the monarchy. After a narrow escape from the fury of the Parisian populace in July 1792 he was imprisoned in the Abbey of Saint-Germain-des-Prés, but was set at liberty before the September Massacres. In September 1793, however, he was arrested at Le Havre, taken to Paris, and denounced to the Convention as an agent of Pitt. He was brought to trial before the revolutionary tribunal on 21 April 1794, and was guillotined the next day.