2.Pedro López
Nickname: The Monster of the Andes
Confirmed victims: 110
Suspected victims: 310–350+
Country: Colombia
Status: Free, whereabouts unknown
Listed by the Guinness World Records as the most prolific serial killer of all time, Pedro López confessed to more than 310 rapes and murders of young girls in at least three countries, Colombia, Peru, and Ecuador. He was sentenced for 110 of them in Ecuador to, you’ve guessed it, 16 years. Pedro López was released from prison in 1998 and his whereabouts are currently unknown. Perhaps it is time for Ecuador to rethink its penal policy, before they have another children mass murderer on their hands.