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Investigation Discovery continues its heritage of providing in-depth  compelling documentaries & shows.

Investigation Discovery

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

Signs of a Psychopath

Masters of Manipulation

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; investigators uncover this was no ordinary murder and that he's an impulsive psychopath.

A Little Emotionally Unwound

A husband becomes the prime suspect when his wife goes missing as police discovers 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.

I Am the Worst Husband

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

Everybody Was Agreeing to It

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.

The Package Killer

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

It's Called Closure

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.

Let's Be Bonnie and Clyde

When a loving husband turns up murdered in his Loveland, Ohio home, the prime suspect is his troubled wife, who claims to have little recollection; detectives uncover her story is nothing but the manipulation of a vindictive person.

They Named Me Stormy

After the murder of a rural Virginia couple and the disappearance of their adult son, detectives wonder who could have acted with such rage; when the son resurfaces, investigators come face to face with a true psychopath.

I Felt a Release

Revisiting some of the most dangerous killers in modern history to see which psychopathic traits they exhibited.

S9 E7 | I Am the Worst Husband

E10 | Masters of Manipulation

E9 | A Little Emotionally Unwound

E7 | I Am the Worst Husband

E6 | Everybody Was Agreeing to It

E5 | The Package Killer

E4 | It's Called Closure

E3 | Let's Be Bonnie and Clyde

E2 | They Named Me Stormy

E1 | I Felt a Release