Pedro López, the “Monster of the Andes”

The Victims: Girls Who Vanished Across Three Countries

The people at the centre of this case were young girls, most of them between about 8 and 12 years old, who disappeared in Ecuador, Peru and Colombia during the 1970s. Ecuadorian reporting describes the remains of 53 girls in that age range being recovered near the city of Ambato. Girls who went missing in the Peruvian highlands, according to press accounts, came largely from isolated or Indigenous communities in the Ayacucho region. For many families, what happened to their daughters was never resolved in court.

The man linked to these disappearances, Pedro Alonso López, was born on 8 October 1948 in Venadillo, in Colombia's Tolima department, according to El Tiempo, and spent much of his childhood in nearby El Espinal. Colombian and Chilean press accounts describe a childhood marked by poverty, life on the streets and abuse. As a young man he served a prison term in Colombia for car theft, a sentence that was lengthened after he killed fellow inmates.

Arrest in Ambato

After leaving prison in Colombia in the late 1970s, López moved through Peru and into Ecuador. In Ambato, a river overflow brought to light the bodies of girls who had been reported missing, prompting an investigation. Shortly afterwards he was detained after attempting to abduct a girl at a market in the city; the child's mother raised the alarm. Most sources place the arrest in 1980, although a 1992 Deseret News report dates it to 1979.

López initially refused to talk to investigators. Ecuadorian reporting says he eventually spoke to a priest, and he then began describing killings across the region. He led police to burial sites near Ambato. The number of victims recovered there differs by source: Ecuadorian and American reports give 53, El Tiempo gives 57, and a 2026 Chilean account says about 54.

Confessions Versus Convictions

The enormous figures attached to López's name come largely from his own statements. He claimed responsibility for at least 110 deaths in Ecuador and around 200 more in Colombia and Peru, which is how the widely repeated total of "more than 300" girls arose. These numbers have never been established in court, and Chilean reporting notes that the courts could not prove most of the confessed killings. They should be read as claims, not as a verified count.

Accounts of the Ecuadorian judgment also differ. The 1992 report states that he pleaded guilty to 110 counts of murder, while the Colombian newspaper Vanguardia wrote in 2023 that he was sentenced for only one of his crimes. Sources agree that the penalty was 16 years in prison, then the maximum available under Ecuadorian law. When early release loomed in 1992, Ecuador's prisons minister conceded that it sounded strange but said it was the law.

Deportation, Psychiatric Detention and Release

López remained in Ecuadorian custody until 1994, when he was sent to Colombia at the request of a court in El Espinal, which had issued a warrant over the deaths of girls in that area in the 1970s. Colombian authorities, after a psychiatric evaluation, declared him inimputable, meaning not criminally responsible, and he was held in a psychiatric facility.

In 1998, after roughly four years, he was declared sane and freed on bail of 80,000 Colombian pesos, on condition that he report to the court each month. He did not comply. According to El Tiempo, he was last confirmed in Bogotá on 22 September 1999, when he renewed his national identity card. In October 2002 Colombia asked Interpol to circulate a search and arrest notice over the suspected killing of a girl in El Espinal; other outlets give different dates for international notices.

Current Status: Whereabouts Unknown

López's fate remains officially unresolved. El Tiempo reported that his identity number was deactivated in 2005 after a fingerprint check on a body, yet the national registry has certified the number as still valid. Vanguardia noted competing theories that he is alive, that he lives on the streets of Bogotá, or that he was killed in revenge; he has also been reported to have used another man's identity document. No source has confirmed his death or a recent sighting.

A search for developments from 2024 to 2026 found only retrospective articles, including a May 2026 feature in Chile's BioBioChile, which reported no new investigation, arrest or confirmation of his fate. If alive, he would be in his late seventies.

Why the Case Still Matters

The case exposed how sentencing and mental-health rules in the Andean countries could allow a man who confessed to mass killings to walk free. In Ecuador in 1980 the ceiling of 16 years applied no matter how many deaths were alleged. In Colombia, Vanguardia explains, multiple sentences are not simply added together, and there is no life imprisonment, a point repeatedly raised in debates over serial offenders. The finding that López was not criminally responsible, followed by his release with only a small bail and monthly reporting, left him beyond the reach of any court.

It also illustrates the difficulty of cross-border justice. Girls disappeared in three countries, but each case was pursued separately, if at all. For many families in the Andes, the case remains a symbol of impunity rather than closure.