The trial of Pétain began on 23 July 1945. Pétain's defense lawyer, Jacques Isorni, pointed out that the public prosecutor, André Mornet, had also been in charge of the failed Riom Trials organized by Pétain under the Vichy regime. This may not have impressed the judge, Pierre Mongibeaux, who had sworn allegiance to Petain in 1941. The 89-year-old Marshal was sentenced to death on 15 August but the sentence was commuted to life imprisonment. He lived six more years, banished to the Île d'Yeu.