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.
Some of these crimes are unsolved, but were included because they are the work of a serial killer, despite nobody being caught.
This list does not necessarily include war criminals or members of democidal governments, such as Adolf Hitler, Hideki Tojo, Joseph Stalin, or Pol Pot.
Convicted of the murders of 9 people in 1989 and 43 people in 1995–1996. Suspected of killing over 90 victims, confessed to 71, convicted of 49. Convicted of murdering 48 victims and suspected of killing 60.
American serial killer known for his charisma and good looks.
Bundy officially confessed to 30 homicides, but has confessed to killing 35–36 women in the past, and some estimates run upwards of 100 or more.
Known as the "Wemmer Pan Killer" and "Hammer Killer".
He killed his victims with different instruments such as guns, rocks, a knife, and a hammer.