Behind bars in Britain are some of the most dangerous people the country has ever known. <br />Killers – men and women - who have killed and killed again to satisfy their own dark desires, often targeting the most vulnerable members of our society. <br /> But who is the worst of the worst? Can we create an index of evil? <br /> Criminologist, Professor David Wilson, has developed a unique system that he believes can Measure Evil, and by doing so, countdown to reveal just who is the most dangerous killer alive in Britain today.
