In this brand new, ground-breaking and revelatory 1 x 60 minute documentary made by Plum Pictures, Piers Morgan ventures behind bars for an extraordinary encounter with diagnosed psychopath Paris Bennett, a man who is more intelligent, more cunning and more manipulative than any criminal Piers has met before. In 2007, Paris – a 13-year-old with a genius level IQ - stabbed to death his 4-year-old sister, Ella. This was no impulsive fit of rage, but a cold, deliberate act planned for weeks beforehand and born of festering resentment. In Bennett’s first interview on British television he admits to Piers that the murder was driven by a calculated desire to inflict pain and misery upon his mother, Charity – who in a unique format twist is watching the encounter as it unfolds on a TV monitor in a nearby room.