Robert Maudsley has spent 45 years locked in a special glass cell beneath Wakefield Prison, earning the nickname "Hannibal the Cannibal" from tabloids. But his crimes behind bars were directed at other criminals -specifically child predators and abusers. After killing two inmates he deemed unworthy of life, Maudsley calmly laid down his weapon and told officers, "The next roll call will be two short." His relentless violence made him Britain's most isolated prisoner, sealed away in his own glass cage.