Pedro Alonso López, known around the world as the “Monster of the Andes,” is one of the most notorious serial killers in South American criminal history.
López was a Colombian serial killer who operated across Colombia, Ecuador and Peru, targeting primarily young girls. After his arrest in 1980, he confessed to killing more than 300 people. However, the total number of victims has never been established with certainty. Authorities were able to connect López to at least 110 murders in Ecuador, while many of the additional killings he claimed have never been independently confirmed.
What makes the case particularly disturbing is what happened after López's conviction. Despite the enormous number of murders attributed to him, he eventually served a relatively short prison sentence, was released, and ultimately disappeared.
More than two decades later, his whereabouts remain unknown.
Who Was Pedro Alonso Lopez?
Pedro Alonso López was born in Colombia in 1948 and eventually became one of the country's most infamous criminals.
His criminal activities eventually extended across several South American countries. López preyed primarily on young girls, many of whom came from impoverished communities whose disappearances did not initially receive the attention they deserved.
The exact details of López's early life vary between sources, and some of the more sensational stories about his childhood come from López's own accounts. What is firmly established is that he developed a long history of criminal behavior before his 1980 arrest for the murders that ultimately made him infamous.
López became known as the Monster of the Andes, a nickname that reflected the geographic scope and extraordinary scale of the crimes he claimed to have committed.
Why Was Pedro Alonso Lopez Called the Monster of the Andes?
The nickname “Monster of the Andes” became associated with López because of the enormous number of murders he claimed to have committed across Colombia, Ecuador and Peru.
According to López's confession, he had killed more than 300 girls across the three countries. Contemporary and later accounts have repeated this figure, but it is important to distinguish between claimed victims and confirmed victims.
Authorities in Ecuador were able to establish a connection between López and 110 murders. He also claimed responsibility for numerous additional killings in Colombia and Peru, but many of those cases could not be independently verified.
That uncertainty has made the true victim count one of the most enduring mysteries surrounding Pedro Alonso López.
Pedro Alonso Lopez's Victims
The question “How many victims did Pedro Alonso Lopez have?” is surprisingly difficult to answer.
The most frequently cited confirmed figure is 110 victims in Ecuador. López claimed that his total was much higher, saying that he had killed more than 300 people across Colombia, Ecuador and Peru.
Investigators were able to recover human remains from burial sites that López identified during his confession. One contemporary report stated that López led police to the graves of 53 victims in Ecuador.
Because many of the alleged murders occurred in remote areas and because numerous victims were never identified, investigators could not establish every killing López described.
This means the most responsible way to describe the case is:
At least 110 murders were connected to Pedro Alonso López, while he claimed responsibility for more than 300.
That distinction is important. The number of 300 or more is frequently repeated in discussions of López, but it should not be treated as a definitive victim count.
Pedro Alonso Lopez's Crimes in Colombia, Ecuador and Peru
López's criminal activities crossed international borders.
He was associated with murders in Colombia, Ecuador and Peru, making the investigation especially difficult. During the period when he was active, communication and cooperation between law enforcement agencies in different countries were far more limited than they are today.
His victims were primarily young girls, many from poor or marginalized communities.
The case eventually gained international attention when Ecuadorian investigators began uncovering evidence connected to López's confession.
The discovery of multiple graves transformed what had initially appeared to be a series of individual disappearances into evidence of a much larger killing spree.
How Was Pedro Alonso Lopez Caught?
Pedro Alonso López was arrested in Ecuador in 1980.
His capture followed an attempted abduction involving a young girl. After his arrest, investigators began questioning him about missing children and suspected murders.
The investigation took a dramatic turn when López began providing information about burial locations.
According to accounts of the case, he led investigators to locations where human remains were discovered. These discoveries provided physical evidence supporting at least some of his claims.
The investigation eventually resulted in López being connected to 110 murders in Ecuador.
The Pedro Alonso Lopez Confession
López's confession became one of the most disturbing aspects of the case.
He claimed that he had murdered more than 300 people across Colombia, Ecuador and Peru.
However, investigators could not independently verify every murder he described.
The confession nevertheless proved significant because López provided information that helped authorities locate burial sites and recover victims.
This evidence separated the case from a simple confession in which an offender makes unsupported claims. Investigators were able to corroborate at least part of López's account through physical evidence.
Even so, the exact number of victims remains unknown.
How Many People Did Pedro Alonso Lopez Kill?
There are two numbers that frequently appear when discussing the case.
110: This is the number most commonly associated with the murders for which López was convicted in Ecuador.
300+: This is the much larger number of murders López himself claimed to have committed across Colombia, Ecuador and Peru.
Therefore, it would be inaccurate to simply state that Pedro Alonso López definitively killed 300 people.
A more accurate description is that López was convicted in connection with 110 murders in Ecuador and claimed responsibility for more than 300 killings overall.
The possibility that additional victims existed cannot be ruled out, but the evidence does not allow every murder in his confession to be confirmed.
Pedro Alonso Lopez's Sentence and Release
One of the most shocking aspects of the Pedro Alonso López case is the amount of time he actually spent behind bars.
López received a prison sentence in Ecuador, but Ecuadorian law at the time placed limits on the maximum period he could serve. Contemporary reporting noted that he was expected to be released after serving only part of his sentence.
A&E reports that López ultimately served approximately 14 years in Ecuador before being released and deported to Colombia in 1994.
His story did not end there.
After returning to Colombia, López was subsequently committed to a psychiatric institution. He was later released again in 1998.
Where Is Pedro Alonso Lopez Now?
This is perhaps the biggest unanswered question surrounding the Monster of the Andes.
After his release, López disappeared from public view.
A Colombian newspaper, El Tiempo, reported that López was last seen in Bogotá on September 22, 1999, when he went to obtain a new identification document.
Since then, his whereabouts have remained unknown.
There have been reports and speculation about what happened to him, but there is no reliable evidence establishing his current location.
As a result, the answer to “Where is Pedro Alonso Lopez now?” is simple:
Nobody knows for certain.
It is also impossible to establish with certainty whether López is still alive.
Is Pedro Alonso Lopez Still Alive?
There is no definitive public evidence establishing whether Pedro Alonso López is alive or dead.
He disappeared after his last reported sighting in 1999, and his subsequent whereabouts have never been conclusively established.
This has contributed to the enduring fascination surrounding his case.
Unlike many notorious serial killers whose deaths occurred while they were imprisoned, López simply vanished from public view after his release.
The Unanswered Questions of the Monster of the Andes
The Pedro Alonso López case leaves behind several disturbing unanswered questions.
How many people did he actually kill?
How many of the murders in his confession were real?
Were there unidentified victims whose cases were never connected to him?
And perhaps most importantly, what happened to Pedro Alonso López after he disappeared?
The confirmed evidence establishes López as a serial murderer responsible for at least 110 killings in Ecuador. His own confession points to a much larger number, potentially exceeding 300 victims, but that figure cannot be independently established.
The uncertainty surrounding the case is part of what has made López such a notorious figure in the history of true crime.
Pedro Alonso Lopez: A Case That Still Has No Final Chapter
Pedro Alonso López became known as the Monster of the Andes after investigators uncovered evidence connecting him to the murders of dozens of young girls in Ecuador.
His confession expanded the suspected scope of his crimes from one country to three, with López claiming responsibility for more than 300 murders.
Yet despite the enormous number associated with his name, the exact victim count remains unknown.
What is certain is that at least 110 murders were connected to him in Ecuador, that investigators recovered victims from burial sites he identified, and that he eventually served a surprisingly short period of imprisonment before being released.
Then, in 1999, the Monster of the Andes disappeared.
More than two decades later, the final chapter of the Pedro Alonso López story remains unwritten.
Frequently Asked Questions About Pedro Alonso Lopez
How many victims did Pedro Alonso Lopez have?
Pedro Alonso López was convicted in connection with 110 murders in Ecuador. He claimed to have killed more than 300 people across Colombia, Ecuador and Peru, but the full number has never been independently confirmed.
Why was Pedro Alonso Lopez called the Monster of the Andes?
López was given the nickname “Monster of the Andes” because of the enormous number of murders he claimed to have committed across Colombia, Ecuador and Peru.
When was Pedro Alonso Lopez arrested?
Pedro Alonso López was arrested in Ecuador in 1980 after an incident involving an attempted abduction.
Where did Pedro Alonso Lopez commit his murders?
López was associated with murders in Colombia, Ecuador and Peru. The largest number of confirmed murders connected to his conviction occurred in Ecuador.
How many murders did Pedro Alonso Lopez confess to?
López claimed that he had murdered more than 300 people across three countries. Authorities were able to confirm only a portion of those claims.
Where is Pedro Alonso Lopez now?
His current whereabouts are unknown. His last reported sighting was in Bogotá in September 1999.
Is Pedro Alonso Lopez still alive?
There is no definitive public evidence establishing whether López is alive or dead. He disappeared from public view after his last reported sighting in 1999.
How long was Pedro Alonso Lopez in prison?
López served approximately 14 years in Ecuador before being released and deported to Colombia in 1994. He was later released from Colombian custody in 1998.








