Investigation Discovery continues its heritage of providing in-depth, compelling documentaries & series that challenge viewers to think about key issues that shape our culture and define our world.

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When officers arrive at a suburban home regarding a felonious assault, they find a bloodied and lifeless woman in her minivan. Detectives later interview her estranged husband, revealing a rage-filled psychopath with a revenge fantasy inspired by a movie.

Signs of a Psychopath

That's What You Do With a Knife

When detectives find an elderly woman dead after someone stuffs her in her own closet, they know they are not dealing with a normal killer. Instead, they discover the culprit is a troubled teenager with a fantasy to rape and kill.

The Biggest Adrenaline Rush

Investigation Discovery HD

When a psychopathic husband kills his young wife and leaves her decapitated head in a bathtub, detectives question him about the crime; when he offers little in the interview, they realize they are confronting a malingering psychopath with control issues.

Something Took Control of Me

Weeks after Christmas, police find a wife and her three young children decomposing in their beds, while her husband is alive yet despondent; what appears to be a mass suicide later proves to be a murder orchestrated by a psychopathic family annihilator.

The Apocalyptic End

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

When a mother, covered in blood and holding a barely breathing newborn, arrives at the hospital, medical staff uncover a faked birth. When investigators interview the woman, they soon realize they are dealing with a violent, infant-stealing psychopath.

I Had Everybody Fooled

When a grandmother vanishes, her grandson spins a twisted narrative about her demise and the disturbing location of her body inside a freezer; it doesn't take long for detectives to uncover the killer responsible, a parasitic psychopath.

I Wanted To Keep Her

A killer brutally murders an elderly couple, and detectives quickly focus on their 17-year-old grandson who lives with them; when they finally capture him, they uncover a charismatic young psychopath with a hunger for fast food and revenge.

I've Got A Criminal Mind

When a young woman vanishes, it doesn't take long for detectives to zero in on her estranged husband; when questioned, he appears eerily calm and casual, but what they soon reveal is an impulsive and rage-driven psychopath who cannot tolerate rejection.

I Just Wanted to Hurt Her

When motorists discover the bodies of a man and woman along I-85, detectives uncover a psychopath with a penchant for guns and violent fantasies.

I Think I Can Outsmart God

After a mother of three mysteriously vanishes following a night out on the town, investigators uncover a sexual psychopath's nightmarish desires; days later, they discover her body in her own septic tank, revealing how callous the murderer is.

Violence Is What I'm Fixed On

When a 15-year-old Florida girl runs away with her troubled boyfriend, someone brutally murders a 66-year-old disabled man miles away in his home; upon their apprehension, police discover the young couple are, in fact, thrill-seeking murderers.

I Can't Stop Myself

When a disturbed brother slaughters three generations of a family, he quickly confesses and continues by confessing to a ten-year-old cold case; detectives uncover a narcissistic psychopath with parasitic tendencies whose one goal is to return to prison.

I Don't Belong Out Here

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

S11 E13 | That's What You Do With a Knife