In The Family I Had, a mother recalls how her brilliant teenage son came to shatter their idyllic family through one horribly violent and shocking act. Now, left to pick up the pieces, the survivors test the boundaries of their newly defined reality in this moving true crime exploration of the nature and limits of familial love.

Piers Morgan ventures behind bars to talk to diagnosed psychopath Paris Bennett about what drove him to murder his four-year-old sister.