Angel of death: Victorian serial killer Amelia Dyer is believed to have killed up to 400 babies. For over 30 years Amelia Dyer was able to conduct her grisly trade with apparent impunity. Little wonder that she is now believed to be Britain's worst ever serial killer. Her crimes have come to light once again after more than 2.5million criminal records from between 1770 and 1934 were placed online by the National Archives.
Serial killing phenomenon is as old as human race. Thug Behram killed more people than any other serial killer. Over the span of 50 years, Thug killed more than 900 people by strangulation using Handkerchief. He was caught, convicted and hanged in 1840 in the age of 75.
Paul John Knowles- The Casanova Killer. Serial killer tied to the deaths of 18 people in 1974, though he claimed to have taken 35 lives. Knowles went on a murderous spree across America, killing, robbing and raping a number of men, women and children.