35 Serial Killers the World Wants to Forget S01E02 - Killers Against the Grain

Chester Turner, according to LAPD, is the most prolific serial killer in the history of Los Angeles. Joanna Dennehy became only the third woman in UK history to be jailed forever without parole for her brutal murders of three men. In Sydney, the most vulnerable of residents were at risk from the "Granny Killer".