Signs of a Psychopath - Season 9

After the murder of a rural Virginia couple and the disappearance of their adult son, detectives wonder who could have acted with such rage. However, when the son resurfaces, it isn't long before investigators come face to face with a true psychopath.

When a loving husband turns up murdered in his Ohio home, the prime suspect is his troubled wife, who claims to have little recollection of the crime. Detectives uncover her spotty memory is nothing but the manipulation of a vindictive psychopath.

A teenage couple goes on the run after an attack on the boy's sister. A search leads officers to the girl's grandparents' home, where they find the bodies of the elderly couple and uncover a fantasy killing concocted by the psychopathic lovers.

Terror rocks an Ohio town when a mother, her two kids and a close friend vanish. Fearing foul play, investigators track down the prime suspect and uncover a house of horrors. Detectives find themselves dealing with a psychopath with a bizarre obsession.

Police catch a break on three cold case murders when emerging DNA technology makes a stunning match: a 73-year-old man who's been in prison since 1993. Detectives interrogate the frail man whose harmless façade is hiding a murderous psychopath.

A young man's confession to participating in a plot to murder another teenager stuns police in a small Florida town. As detectives dig in, they uncover a sadistic plot involving a manipulative ex-girlfriend and a young psychopath with the desire to kill.

Once a wife goes missing, her husband becomes the prime suspect when police discover his checkered past. Lacking a body or evidence of foul play, detectives hope to gain a confession from a man they realize might be a cold-blooded psychopath.

A teenage girl goes missing just before Christmas. Unable to find her, detectives obtain a secret recording that uncovers an evil plot by a psychopath willing to do whatever it takes to satisfy their wicked needs and evil desires.

After the murder of a successful executive one night in Connecticut, her case goes cold. Four years later, a troubled man appears, ready to confess. In his interview, investigators uncover this was no ordinary murder and that he's an impulsive psychopath.

When being interviewed by police, psychopaths often use manipulation to thwart the investigation. Here, experts explore the anatomy of the key manipulative tactics of psychopaths and how they try to utilize them for their own sinister gain.