Fred Dinenage follows the extraordinary tale of serial killer Patrick Mackay, who savagely murdered more than three people in cold blood.Certified a psychopath at 15, could these murders have been prevented if the authorities had stepped in earlier? Fred meets WPC Amy Tapp who dealt with Mackay in his youth when his disturbing behaviour had already become a cause for concern. John Penycate, author of ‘The Psychopath' and Panorama Producer, gives a real insight into the disturbed mind of Mackay who became increasingly violent towards the elderly.Lawyer Robin Clarke and Ken Tappenden, who led the hunt for Mackay once he had committed the brutal murders, help Fred discover more about the horrific actions of the man who earned the nickname of ‘The Psychopath'.