1. Henry Lee Lucas (360 to 900 victims)
Henry Lee Lucas is a serial killer from Virginia, United States. Born into a severely dysfunctional family, his mother was a prostitute and his father was disabled and an alcoholic. Subjected constantly with cruelty and abuse, he grew up into a sadistic psychopath. Uneducated and malnourished, he never developed a valuable skill that could give him a meaning in life. He was convicted for 360 murder cases, although, he confessed for killing more than 900 people, in some interrogation sessions. Henry died after a cardiac arrest in his cell at 2001.