With the killers captured, the cases go to trial. The stakes are high as both Herbert Mullin and Edmund Kemper attempt to plead insanity. Will they succeed? In the season finale, Dr Michelle Ward details the ultimate fates of the serial killers and their lasting impact on Santa Cruz. Watch full episodes of Mind of a Monster on discovery+: discoveryplus.com/mindofamonster *discovery+ is currently only available for US subscribers.   See acast.com/privacy for privacy and opt-out information.