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Crime & Justice • Serial Killer

Pedro López

Pedro Alonso López is a Colombian serial killer and child rapist known as the "Monster of the Andes." He was convicted in Ecuador for the murders of at least 110 girls and later claimed responsibility for more than 300 killings across Colombia, Ecuador, and Peru.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

Pedro Alonso López is a Colombian serial killer and child rapist known as the "Monster of the Andes." He was convicted in Ecuador for the murders of at least 110 girls and later claimed responsibility for more than 300 killings across Colombia, Ecuador, and Peru. After his release from prison in 1994 and a later release from custody in Colombia in 1998, his whereabouts became unknown.

Early life

Pedro Alonso López was born in 1948 in Colombia. Accounts of his early life describe abuse, homelessness, and instability, though the exact details vary by source.

Criminal activity

López’s crimes are reported to have occurred across Colombia, Ecuador, and Peru, with victims described as mostly young girls. He became known as the "Monster of the Andes" after leading investigators to burial sites in Ecuador.

Trial and imprisonment

He was charged and later convicted in Ecuador for the murders of 110 girls, receiving the maximum sentence available under Ecuadorian law at the time. He served 14 years before being released in 1994.

Later status

After returning to Colombia, López was reportedly institutionalized and later released in 1998. Since then, public reports have described him as missing or a fugitive, with no confirmed recent whereabouts.

Key facts

  • López was active primarily between 1978 and 1980 and targeted mostly pre-teen girls.
  • He was convicted in Ecuador after confessing to multiple murders and leading police to graves of victims.
  • Sources report that he claimed to have killed more than 300 people, though verified totals are lower.
  • He was released from prison in Ecuador in 1994 after serving 14 years.
  • He was later institutionalized and released again in Colombia in 1998, after which his whereabouts were unknown.

Frequently asked questions

Who was Pedro López?
Pedro Alonso López was a Colombian serial killer and child rapist known as the "Monster of the Andes." He was convicted in Ecuador for multiple murders and is linked to crimes across three South American countries.
How many people did he kill?
Authorities verified at least 110 murders in Ecuador, while López claimed responsibility for more than 300 killings overall. The total number of victims remains disputed.
Why was he called the Monster of the Andes?
He gained that nickname after his crimes in the Andes region and after he reportedly led police to victims’ graves in Ecuador.
When was he released from prison?
He was released from prison in Ecuador in 1994 after serving 14 years, then later released in Colombia in 1998 after being institutionalized.
Is Pedro López still alive?
His current status is unconfirmed in the available sources, and his whereabouts have been reported as unknown since the late 1990s.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/Pedro_L%C3%B3pez_(serial_killer)
    Supports: Birth date, nationality, alias, victim count claims, and general biography.
  2. The True Crime Databasehttps://www.thetruecrimedatabase.com/case_file/pedro-lopez/
    Supports: Confession details, charging and sentencing information, and victim-count claims.
  3. A&Ehttps://www.aetv.com/articles/pedro-alonso-lopez-monster-of-the-andes
    Supports: Alias, arrest, conviction, release from prison, and reported victim totals.
  4. Biography.comhttps://www.biography.com/crime/pedro-alonso-lopez
    Supports: Early-life background, birthplace, release history, and unknown whereabouts.
  5. IMDbhttps://www.imdb.com/name/nm3876314/bio/
    Supports: Birthplace, conviction summary, later institutionalization, and release in Colombia.
  6. Yahoo Entertainmenthttps://www.yahoo.com/entertainment/serial-killer-pedro-lopez-still-094115256.html
    Supports: Reported release history, last sighting claims, and unknown current whereabouts.