Pedro Alonso López (born 8 October 1948[1] – disappeared September 1999), also known as The Monster of the Andes, is a Colombian serial killer, child rapist, and fugitive who murdered a minimum of 110 people, mostly young women and girls, from 1969 to 1980.

Pedro claimed his mother was a prostitute, and had a difficult childhood due to the violence of the household and the absence of a father figure.

[5] Upon his release from prison in 1978, López began wandering throughout the northwestern area of South America, eventually arriving in Peru.

[6] While these claims are unverifiable, it is known that López was briefly captured by an Ayacuchoan indigenous tribe in south-central Peru after attempting to abduct a 9-year-old girl.

[8] After his deportation from Peru, López resumed his killing spree, and although authorities began to notice an increase of missing persons, more specifically young girls, throughout areas where he travelled, they concluded the disappearances were most likely cases of human trafficking.

[8] In April 1980, the areas surrounding Ambato, Ecuador were hit by flash flooding, unearthing the remains of several young girls who had been previously reported missing.

[8] Not long after the flooding, a local woman named Carvina Poveda was on her way to the market with her 12-year-old daughter Marie when López attempted to abduct the girl.

[11] The last reported sighting of López was in September 1999, when he visited the National Civil Registry to renew his citizenship card.

[16] In 2002, Colombian National Police and Interpol issued warrants for López's arrest over a murder bearing some similarities to his modus operandi.