The 1970s saw some of the worst mass killings and murders in recent history. Fanatical cult leader Jim Jones was responsible for the deaths of hundreds, while serial killers Ted Bundy and John Wayne Gacy each had dozens of victims. The chilling crimes of murderers including the Yorkshire Ripper - Peter Sutcliffe - and the Hillside Strangler stunned the world when the details were made public. In Murders That Shook the World - 1970s, author Stuart Qualtrough investigates the decade's worst murders and murderers.