The fourth column in the table states the number of victims definitely assigned to that particular serial killer, and thus the table is in order of that figure.
Child-murderer and rapist, known as "The Monster of the Andes".
Targeted young girls, between the ages of 8 and 12.
Known as The Butcher of Rostov, The Red Ripper or The Rostov Ripper.
Convicted of the murder of 53 women and children between 19.
In many cases, the exact number of victims assigned to a serial killer is not known, and even if that person is convicted of a few, there can be the possibility that he/she killed many more.
The complex nature of serial killers, their crimes, discrepancies caused by geographic location and/or time, and the investigations related to these persons results in difficulties in organization and ranking.
Gacy was known as the "Killer Clown" due to the fact he often entertained children at social events dressed in a self devised clown costume. Gang leader known as al-Tourbini ("The Express Train").
Raped and tortured homeless children, mostly boys aged 10 to 14 years old, aboard the trains between Cairo, Alexandria, Qalyoubeya and Beni Sueif.
Traveled through Europe illegally from 1990 to 1995; whether he killed during this time is unknown. Claimed to have murdered 62 people, because he did not know that two of his victims had survived; stated goal of becoming Russia's most prolific serial killer. Preyed on unemployed women, posing as a businessman and luring his victims with the prospects of a job, before leading them to an isolated place, where he raped, tortured, and murdered them.
Sentenced to 2410 years imprisonment with a non-parole period of 930 years.
American serial killer known for his charisma and good looks.