 Intercepted letters were produced which revealed Alexander's bitterness against his father.In vain did Archelaus, Alexander's father-in-law, endeavor to bring about better relations between them; the reconciliation was again a brief one, so that once more the intrigues of Antipater and Salome succeeded in securing the incarceration of Alexander and Aristobulus (about 8 BC).Herod lodged formal complaint of high treason against them with Augustus, who put the matter into Herod's own hands, with the advice to appoint a court of inquiry to consist of Roman officials and his own friends.