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A serial killer is someone who kills others, usually strangers or acquaintances, with a "cooling-off" period in-between the murders. While the minimum requirement for being a serial killer is three victims, murderers who have less than that but attempted or were likely to have killed again are also listed here. Types of serial killers include:

  • Visionary: The perpetrator is delusional, killing for reasons such as believing an otherworldly force (often heavenly or hellish in origin) is somehow forcing or coercing them to.
  • Mission Oriented: The perpetrator targets specific people for specific reasons, such as revenge for real or imagined wrongs, or due to believing that they are somehow making the world a better place by cleansing it of certain groups, such as other criminals or people of different sexual orientation, class, gender, religion or race.
  • Lust: The perpetrator attains sexual gratification from the torture and mutilation of their victims.
  • Thrill: Excitement and the rush caused by the kill is what the perpetrator is after, meaning their victims tend to be completely random, and they may be prone to switching their tactics. Infamy or the belief that they can outsmart the authorities is another possible motivation.
  • Comfort/Profit: While the perpetrator may enjoy killing, financial or material gain is their primary motivation, and they may attain it through acts such as fraud, forgery, embezzlement, theft, or contract killing.
  • Control: Often abused themselves, leading to feelings of inadequacy and inferiority, the perpetrator attains a sense of power and purpose through torture, humiliation and killing.

Related to the serial killer is the mass murderer, like Cameron Coulter, Neil Hanlon and Paul Chaney, who kill or wound several people in one place, like a school or restaurant, and a spree killer, which is essentially a mobile mass murderer, targeting multiple places instead of focusing on just one.

Henry Floyd[]

  • Episodes: "The Hitchhiker"
  • Victims: Chuck Praska, Brian Fritz
  • Survivors: Janice Burns
  • Years: 2000, 2003
  • Status: Arrested
  • Type: Profit
  • Modus Operandi: Picked up, robbed, and shot young men hitchhiking from Atlantic City. Also intended to kill his girlfriend for speaking with the Philadelphia PD.

George Marks[]

Roy Brigham Anthony[]

  • Episode: "Creatures of the Night"
  • Victims: Mike Cahill and 8 others
  • Survivors: None
  • Years: 1977, 1978, 1979
  • Status: Arrested
  • Type: Visionary
  • Modus Operandi: Strangled uniformed people who he claimed emanated "God's light".

Miguel Maldonado[]

John Harding[]

  • Episode: "One Night"
  • Victims: Steve Jablonski
  • Survivors: Justin Bradley
  • Years: 1980, 2006
  • Status: Arrested
  • Type: Control
  • Modus Operandi: He would kidnap teenage boys, make them write their wills, and force them to dig their own graves, before forcing them into pine boxes and burying them alive; all for envying their young hope and innocence
  • Basis: Larry Gene Bell

Ramon Delgado and Martha Puck[]

Larry Kenick[]

  • Episode: "The Good Death"
  • Victims: 6
  • Survivors: None
  • Years: 1997-2007
  • Status: Arrested
  • Type: Mission Oriented
  • Modus Operandi: Would inject patients who had lost the will to live or had no chance of recovery with a fatal amount of morphine.
  • Basis: Charles Cullen


  • Episode: "It Takes a Village"
  • Victims: Damont Henderson, Kendrick Malone, Marcus Hollister, Shemar Reynolds
  • Survivors: Corey Middleton, Tyrell Hobbs
  • Years: 1999, 2001, 2003, 2007
  • Status: Deceased
  • Type: Control
  • Modus Operandi: Search for potential victims at arcades playing the game Defector III, in which the goal is to knock the other player into "The Pit". Malik, who was skilled at the game, would play versus-matches with his intended victims, hoping for them to beat him at it. If they did, he would abduct them by using their victories over him to gain their trust. After abduction, he would lock them in a storage room and they would stand in a square for many hours, causing shin splints. He would then murder them by slashing their throats.
  • Basis Wayne Williams

Mitch Hathaway[]

Alessandro Rossilini[]

"John Smith"[]

  • Episode: "The Road"
  • Victims: Monica Capcot, Colleen Legarth, Vesenia D'Valasquez and Margaret Hack
  • Survivors: Brenda MacDowell
  • Years: 2006, 2007, 2008
  • Status: Arrested
  • Type: Thrill or Control
  • Modus Operandi: Held the victims captive, eventually entombing them alive after they lost the will to live due to sensory deprivation and psychological torture.

Richard Kiesel[]

  • Episode: "Mind Games"
  • Victims: 2
  • Survivors: None
  • Year: 2004
  • Status: Arrested
  • Type: Thrill
  • Modus Operandi: A serial arsonist responsible for a number of gasoline fires, two of which resulted in fatalities.

Paul Shepard[]