15. William Bonin: The Freeway Killer
Bonin was also known as the 'Freeway Killer'. Between 1979 and 1980, he raped, tortured and murdered at least 21 young men. Bonin would dump their bodies along freeways in South California. After being convicted for 14 of his killings, he was executed by lethal injection in 1996. His sadistic side was still seen during his prison sentence where he corresponded with many of his victims' families about how their children reacted to his torture.
14. Paul Knowles: The Casanova Killer
Also known as the Casanova Killer, Knowles used his charm into making victims believe him and later killed them. He killed a total of 18 people, although the count might be more. His victims included men, women and children. The man from Florida was eventually killed by an FBI agent in 1974 when he was trying to escape.
13. John George Haigh: Acid Bath Murderer
John George Haigh was also known as the 'Acid Bath Murderer' and operated during the 1940s. He was convicted for the murders of 6 people, although he claimed to have killed 9. He was a professional conman, who lured wealthy people by charm and deceit, into to a warehouse where he shot them. Later he would dissolve their bodies in sulphuric acid then forge papers to sell their possessions and collect their life savings. He was sentenced to death and hanged in 1949.
12. Dennis Raider: BTK Murderer
Between 1974 and 1991, Dennis Raider murdered 10 people in Wichita, Kansas. He even sent letters to police taunting them under his alias name BTK which stood for ‘Bind, Torture, Kill’. His technique was to stalk his victims before breaking into their homes, binding their limbs and finally strangling them. He disappeared in 1988, but remerged in around 2005 when he sent a floppy disc to the press which helped in tracing him. Rader confessed to his crimes and is serving 10 consecutive life sentences with the earliest release date possible on February 26, 2180.
11. Patrick Wayne Kearney: The Trash Bag Killer
Also called the Trash Bag Killer, he operated between 1975 -1977. Kearney had a high IQ but once captured, he confessed to 32 murders of homosexual men. Kearney would dump their bodies along California highways and wrapped them in trash bags thus earning the name. He was convicted of 21 murders, but was sentenced to life because of his confession.

Bonin was also known as the 'Freeway Killer'. Between 1979 and 1980, he raped, tortured and murdered at least 21 young men. Bonin would dump their bodies along freeways in South California. After being convicted for 14 of his killings, he was executed by lethal injection in 1996. His sadistic side was still seen during his prison sentence where he corresponded with many of his victims' families about how their children reacted to his torture.
14. Paul Knowles: The Casanova Killer
Also known as the Casanova Killer, Knowles used his charm into making victims believe him and later killed them. He killed a total of 18 people, although the count might be more. His victims included men, women and children. The man from Florida was eventually killed by an FBI agent in 1974 when he was trying to escape.
13. John George Haigh: Acid Bath Murderer
John George Haigh was also known as the 'Acid Bath Murderer' and operated during the 1940s. He was convicted for the murders of 6 people, although he claimed to have killed 9. He was a professional conman, who lured wealthy people by charm and deceit, into to a warehouse where he shot them. Later he would dissolve their bodies in sulphuric acid then forge papers to sell their possessions and collect their life savings. He was sentenced to death and hanged in 1949.
12. Dennis Raider: BTK Murderer
Between 1974 and 1991, Dennis Raider murdered 10 people in Wichita, Kansas. He even sent letters to police taunting them under his alias name BTK which stood for ‘Bind, Torture, Kill’. His technique was to stalk his victims before breaking into their homes, binding their limbs and finally strangling them. He disappeared in 1988, but remerged in around 2005 when he sent a floppy disc to the press which helped in tracing him. Rader confessed to his crimes and is serving 10 consecutive life sentences with the earliest release date possible on February 26, 2180.
11. Patrick Wayne Kearney: The Trash Bag Killer
Also called the Trash Bag Killer, he operated between 1975 -1977. Kearney had a high IQ but once captured, he confessed to 32 murders of homosexual men. Kearney would dump their bodies along California highways and wrapped them in trash bags thus earning the name. He was convicted of 21 murders, but was sentenced to life because of his confession.
