 Henry Curtis-Bennett for the defence argued that True was insane, and brought several witnesses to testify to True's erratic and morbid behaviour since childhood.Richard David Muir for the prosecution cited the M'Naghten Rules, arguing that if True knew what he was doing was wrong, he was criminally responsible.Justice Henry McCardie instructed the jury that to find True insane, they would have to agree that he had no knowledge of what he was doing when he struck his victim not just once, but four times.