Pedro Alonso López  (born October 8th, 1948), also known by his criminal alias The Monster of the Andes, is a Columbian serial killer accused of raping and murdering over 300 South American girls.

His victims', who were usually nine to twelve years old, murders ranged from Peru to Ecuador and López became known by his aforementioned nicknamed when he led the police to 53 graves of his young victims. In 1983, it was revealed he had over 110 young victims yet he confessed to 240. Despite this, he was released from prison in 1998 via a $50 bail after being declared sane.