Pedro Alonzo Lopez, a serial killer from Colombia known as the “Monster of the Andes,” was released from prison years ago, and his current whereabouts remain unknown. Lopez admitted to murdering hundreds of individuals, making him one of the most prolific and notorious serial killers in history. His case highlights significant failures in the justice systems of the countries where he committed his crimes.
Early Crimes and Escalation
Lopez’s criminal history began with a conviction for vehicle theft in Colombia in 1969. While incarcerated, he reportedly endured sexual abuse from fellow inmates. According to accounts, he retaliated by killing them with a makeshift weapon. This led to an extended sentence, but he was eventually released in 1978. Following his release, Lopez embarked on a brutal spree of rape and murder, primarily targeting young, vulnerable girls across Colombia, Ecuador, and Peru.
His victims were often from impoverished backgrounds. After kidnapping, raping, and killing them, he would conceal their bodies. At one point, it is alleged he was killing as many as three girls per week. The scale of his crimes began to surface in 1979 when a flash flood in Ecuador exposed some of his victims’ bodies. During this period, Lopez attempted to abduct a 12-year-old girl named Maria Poveda in Ambato, Ecuador. Fortunately, the girl’s mother intervened, thwarting the abduction and leading to Lopez’s capture by authorities.
Confessions and Legal Proceedings
Following his apprehension, police uncovered 53 burial sites containing the bodies of girls aged between nine and 12. Lopez was ultimately convicted of 110 murders, and


