1. "The Argentine Vampire" - Florencio Fernández.
Florencio was a sex criminal suffering from mental illness who, in the 1950s, suffered a delirium that made him believe he was a vampire. This belief lead him to kill 15 women by biting out their jugular veins, and he claimed that drinking blood gave him orgasms. He'd kill his victims by first following them home and then he'd break in through a window when they were alone.
He was caught in February 1960 at the age of 25 while living in a dark cave, since he suffered photophobia. He died a year later in a mental institution.
2. "The Great Blood Sorceress" - Magdalena Solís.
3. "The Alto Hospicio Psycopath" - Julio Pérez Silva.
4. "The Monster of the Andes" - Pedro Alonso López.
5. "The Prostitute Killer" - Agustín Salas del Valle.
6. "The San Isidro Rapist" - Francisco Antonio Laureana.
7. "The Killer Actor" -- Ramiro Artieda.
Artieda was a sex criminal who was responsible for the murder of at least 8 18-year old women between 1937 and 1939, all of whom bared an uncanny resemblance to one another. Ramiro studied drama in the United States, where he learned the techniques that he'd use to help lure his victims. Some of the characters he created to commit his crimes included a film producer, a monk, and a professor. Using these disguises, he took women to secluded areas where he'd sexually abuse and then strangle them.
When he was captured by the authorities, the killer confessed that his intention was to kill any young women that he felt looked like an ex-girlfriend who had dumped him. He was sentenced to death on July 3, 1939.
8. "The Poquianchis" – 4 sisters from the González Valenzuela family.
9. "The Apostle of Death" - Pedro Pablo Nakada Ludeña.
10. "The Angel of Death of Rio de Janeiro" - Abraão José Bueno.
11. "The Well-Groomed Man" - César Armando Librado Legorreta.
12. "The Criollo Dexter" - Luis Gregorio Ramírez Maestre.
13. "The Vampire of Niteroi" - Marcelo Costa de Andrade.
14. "The Child of Terror" - Juan Fernando Hermosa.
In a previous version of this article, an incorrect photo was used for Magdalena Solís.