
An in-depth look at some of the world's most dangerous murderers.

In July 1979, 22-year-old Sally Ann McGrath vanished in Peterborough; her body was found months later.

In 1985, George Naylor strangled Deborah Kershaw, just weeks after being freed from prison for rape.

In April 2003, Phillip Hegarty bludgeoned his friend Derek Bennett to death, motivated by greed and money.

A cold-blooded serial killer takes the lives of eleven people during a terrifying decade-long murder campaign.