Upon release from juvenile prison at age 18, he began killing young girls in Peru and later moved to Columbia and Equador. He is believed to have killed up to three girls each week at his peak and around 300 victims total, earning the title of "the world's most prolific serial killer". Currently in prison in Equador, if he is ever released he will serve prison sentences in Columbia and Peru.
Caught fondling his younger sister, Pedro was kicked out of the house by his prostitute mother at the age of 8. On the street he was sodomized by a pedophile and eventually incarcerated by age 18. In prison, he was gang raped by fellow inmates who he later killed.