When a 19-year-old Colorado woman vanishes, the suspect is her troubled former classmate who has a past filled with homicidal urges toward women. S4/Ep9
An 18-year-old man is reported missing in North Dakota. Witnesses lead police to a young man with a history of violence, who didn't work alone. S4/Ep13
Experts delve into disturbing cases of psychopathic killers known as "family annihilators," who see family members as simply potential victims. S4/Ep11
Investigators search a farm for a missing man and find human remains. The owner admits that her pigs ate her tenant alive, and he's not the only victim. S3/Ep17
A racially motivated serial killer, who targeted civil rights leader Vernon Jordan and pornography publisher Larry Flynt, confesses to further murders. S3/Ep18
A woman finds her brother dead in his bedroom with his throat slashed. The individual responsible is a manipulative psychopath who craftily deflects blame. S3/Ep16
The signs of psychopathy lurk in all humans - grandiosity, sadism, superficial charm, manipulation, lack of empathy, or having a parasitic lifestyle. S3/Ep11
A gunman shoots a young man and woman on their way home from work. Detectives learn that this is no random attack but the twisted plan of a psychopathic stalker. S2/Ep9
A gunman shoots a young man and woman on their way home from work. Detectives learn that this is no random attack but the twisted plan of a psychopathic stalker. S2/Ep9
A missing woman's brutally beaten body is found in a dilapidated house near her home. The case goes cold until a local teen makes a sickening claim. S3/Ep8
A mother is found dead after reporting her son to the police. When he turns himself in, his confession isn't just cold-hearted, it's psychopathic. S3/Ep6
A woman's body is found strangled near a country road. Investigators learn the suspect is a prolific serial killer who raped and murdered eight women. S1/Ep11
When a beloved elderly couple disappears, detectives discover their son not only lived off their charity but also took sadistic pleasure in murdering them. S3/Ep1
A man finds his girlfriend and her mother murdered in their beds at night. He calls 911 for help - but police discover his urge to seek revenge. S3/Ep3
A man confesses he "accidentally" killed his best friend while cleaning his gun. During his interrogation, he admits to police he's a serial killer. S3/Ep9
After his conviction for brutally slaying his wife, a Florida inmate says he has killed another woman, revealing he's a psychopath with a history of violence. S3/Ep7
A missing woman's brutally beaten body is found in a dilapidated house near her home. The case goes cold until a local teen makes a sickening claim. S3/Ep8
A mother is found dead after reporting her son to the police. When he turns himself in, his confession isn't just cold-hearted, it's psychopathic. S3/Ep6
A mother claims not to know how her children died. An investigation reveals the tragedy isn't an accident but a carefully crafted killing by a vengeful psychopath. S2/Ep5
A sadistic "Tourniquet Killer" terrorises young girls in Texas. He confesses to multiple murders and grants one final interview before his execution. S2/Ep17
A woman's body is found strangled near a country road. Investigators learn the suspect is a prolific serial killer who raped and murdered eight women. S1/Ep11