World's Most Evil Killers

Jerald Wingeart: In 1973, Dawn Magyar's body was found two months after she had vanished. Twenty-eight years on, advances in forensics helped solve the case. (S8, ep 2)

John Eric Armstrong: In 1999 and 2000, John Eric Armstrong prowled Detroit looking for sex workers. A seemingly normal father, no one suspected he was a killer. (S8, ep 3)

John Eric Armstrong: In 1999 and 2000, John Eric Armstrong prowled Detroit looking for sex workers. A seemingly normal father, no one suspected he was a killer. (S8, ep 3)

Robert Berdella (Kansas City Butcher): A look at the horrific crimes committed by the serial killer, known for kidnapping, raping, torturing and 'butchering' his victims.

Robert Berdella (Kansas City Butcher): A look at the horrific crimes committed by the serial killer, known for kidnapping, raping, torturing and 'butchering' his victims.

Richard Biegenwald: Over a 25-year career of murder, Richard Biegenwald killed at least six people as he sought out ever more inventive ways of dealing death. (S8, ep 4)

Richard Biegenwald: Over a 25-year career of murder, Richard Biegenwald killed at least six people as he sought out ever more inventive ways of dealing death. (S8, ep 4)

Glen McCurley: Examine the crimes of Glen McCurley, who in 1974 abducted 17-year-old Carla Walker from a bowling alley car park and killed her before leaving her body in a ditch. (S9, ep 1)

Glen McCurley: Examine the crimes of Glen McCurley, who in 1974 abducted 17-year-old Carla Walker from a bowling alley car park and killed her before leaving her body in a ditch. (S9, ep 1)

Patrick Wayne Kearney - Trash Bag Killer: The story of one of the most prolific serial killers in America, with a victim list of at least 25 - the youngest aged just five.

Patrick Wayne Kearney - Trash Bag Killer: The story of one of the most prolific serial killers in America, with a victim list of at least 25 - the youngest aged just five.

Donald Henry Gaskins: A profile of serial killer Donald Henry Gaskins who murdered more than a dozen people in South Carolina in the 1970s before being apprehended. (S9, ep 4)

Donald Henry Gaskins: A profile of serial killer Donald Henry Gaskins who murdered more than a dozen people in South Carolina in the 1970s before being apprehended. (S9, ep 4)

Jerry Brudos - The Shoe Fetish Killer: The crimes of Jerry Brudos, whose disturbing shoe fetish played a part in the gruesome murders he carried out on four young women.

Jerry Brudos - The Shoe Fetish Killer: The crimes of Jerry Brudos, whose disturbing shoe fetish played a part in the gruesome murders he carried out on four young women.

Wayne Williams: From 1979 to 1981, at least 28 children were murdered after vanishing from Black neighborhoods of Atlanta, sparking terror in the community. (S9, ep 5)

Wayne Williams: From 1979 to 1981, at least 28 children were murdered after vanishing from Black neighborhoods of Atlanta, sparking terror in the community. (S9, ep 5)

William Suff: A profile of the murderer known to some as the Riverside Prostitute Killer, who sits on death row after being convicted for the slaying of 12 women.

William Suff: A profile of the murderer known to some as the Riverside Prostitute Killer, who sits on death row after being convicted for the slaying of 12 women.

David Marmolejo: An in-depth look at the case of David Marmolejo, who was convicted of the brutal murder of his own mother in 2009. (S9, ep 6)

David Marmolejo: An in-depth look at the case of David Marmolejo, who was convicted of the brutal murder of his own mother in 2009. (S9, ep 6)