He was captured by Angevin forces under the mercenary leader Mercadier and Prince John in a Normandy campaign, in 1197. Richard was still refusing to release him a year later, and again early in 1199. When Peter of Capua (who was trying to enlist Richard for the Fourth Crusade) insisted that Richard release Philip, Richard exploded and threatened to castrate Peter, so intense was his hatred of his prisoner Philip. Pope Celestine III was unsympathetic to Philip, confined at Rouen and then, after an escape attempt, at Chinon. He was freed only after Richard’s death in 1199, with Richard's successor, John agreeing to exchange him for the captured bishop-elect of Cambrai in 1200.