Dr Gwen Adshead has been a forensic psychiatrist for 30 years
Half-brother Rich Bundy has spoken about his notorious sibling in an Amazon Prime Video docu-series
Over 30 years after killing their parents, here's where they are now
Brothers Lyle, now 56, and Erik, now 53, have been behind bars for nearly three decades
Amnesty International called Japan's controversial death row execution method 'cruel'
Killer clown John Wayne Gacy showed off the 'trick' during a 1992 CBS interview
Stephen McDaniel was posing in plain sight before he was called in for questioning
John Hunt's wife and two daughters were killed earlier this year
'Killer clown' John Wayne Gacy was responsible for murdering at least 33 young men and boys in Chicago
Nurse Hadley explained curiosity got the better of her and she decided to Google her patient
The killer posed as a concerned neighbour while hiding a dark secret
The FBI criminal profiler inspired Netflix's Mindhunter
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Serial killer John Wayne Gacy had some strange requests for people that wanted to contact him in prison
John Wayne Gacy killed 33 boys and men in the Chicago area in the 1960s and 70s
Forensic psychologist shared Deadpool killer's 'true feelings inside' as jury give him death penalty
'Deadpool Killer' Wade Wilson has been sentenced to death after killing two women in 2019
Wade Wilson was sentenced to death for the grisly murders
Cheryl Bradshaw was left counting her lucky stars that she did not date the eligible bachelor after his true identity was revealed
'Deadpool killer' Wade Wilson has been sentenced to death for murdering two women
Husband admits spiking his wife's Coke with cocaine in an attempt to kill her and marry her daughter
Alfred Ruf came clean to authorities after his wife's daughter convinced him to try and murder her mother
Ian Huntley was given two life sentences for the Soham murders
He was smiling, but had just committed a horrific crime
Barbora Skrlova deceived people into believing she was a child
Mindhunter viewers have a lot of questions after seeing most recent photo of serial killer Ed Kemper
The notorious serial killer is now 75-years-old