Investigation Discovery

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.

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.

When remains found in a swamp are identified, friends are stunned; Mindi Kassotis was supposed to have died in a hospital; five months later, police say she was murdered, and focus on her husband, Nick, to unravel how she died twice.

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.

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.

When a college student in Milwaukee vanishes after a first date, investigators race to retrace her final movements.

Renee wonders why her brother, Ricky, targets her; thankfully, her oldest brother, Ronnie, protects her and keeps Ricky in check; after years of his cruelty, they've had enough of him and fight back; that's when Ricky plots his revenge.

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.

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.

The key to solving homicides lies somewhere within the final 24 hours of the victim's life.

A scorned stagehand murders a young cellist during the intermission by shoving her down a ventilation shaft after she rebuffs his advances.

A man tries to murder his wife by getting her bitten by a rattlesnake; when she takes too long to die, he gets impatient and drowns her in the bathtub instead.

A greedy woman murders her unsuspecting husband and disguises it as a hunting accident; by the time police discover foul play, she has already covered her tracks and points the finger at her jealous ex.

Determined to kill her beautiful, ballet-dancing neighbor, a girl feeds her a drugged meal and bludgeons her to death.

A scorned stagehand murders a young cellist during the intermission by shoving her down a ventilation shaft after she rebuffs his advances.

A man tries to murder his wife by getting her bitten by a rattlesnake; when she takes too long to die, he gets impatient and drowns her in the bathtub instead.

A greedy woman murders her unsuspecting husband and disguises it as a hunting accident; by the time police discover foul play, she has already covered her tracks and points the finger at her jealous ex.

Determined to kill her beautiful, ballet-dancing neighbor, a girl feeds her a drugged meal and bludgeons her to death.

A scorned stagehand murders a young cellist during the intermission by shoving her down a ventilation shaft after she rebuffs his advances.

A man tries to murder his wife by getting her bitten by a rattlesnake; when she takes too long to die, he gets impatient and drowns her in the bathtub instead.

A greedy woman murders her unsuspecting husband and disguises it as a hunting accident; by the time police discover foul play, she has already covered her tracks and points the finger at her jealous ex.

Determined to kill her beautiful, ballet-dancing neighbor, a girl feeds her a drugged meal and bludgeons her to death.

The murder of schoolteacher Mary Catherine Edwards in Beaumont, Texas, and her unexpected connection to the killer.

In a small Texas town, a mother's worst nightmare becomes a tragic reality.

A woman is found dead in her burning Illinois home in 2020, but it is not clear if the fire is what killed her.

A woman survives a home invasion perpetrated by a masked intruder who disguised his voice to sound like Batman.

Nearly 28 years after the murder of JonBenét Ramsey, the case remains unsolved; Erin Moriarty dives into the case she's covered since 1999, uncovering fresh perspectives and exploring new clues.

A young woman is found shot in her car on the side of a road with her ex-boyfriend bloodied and disoriented nearby; the boyfriend claims he can't remember what happened.

In Florida, officers negotiate with a man brazenly wielding a machete as he takes a hostage. In Louisiana, a drug overdose call takes an unexpected turn. Also in Florida, deputies rush to save a mother and child from drowning in their submerged car.

Police discover a beloved teacher stabbed and beaten to death and turn to those who knew her best. The truth proves more tragic than anyone could believe. A movie-style murder plot leads investigators to a killer.

In Connecticut, police hunt down a gunman who has shot at an officer, in Wisconsin, police launch a chase to intercept a driver with stolen plates, and in Florida, Sheriff's K9s are on the trail of a man who viciously assaulted his girlfriend.

A man finds a mom dead in her bathtub and calls 911 in a panic, claiming an accident. Shocking testimony reveals the truth. Police send a 911 caller to prison for a deadly assault - but is he innocent?

Police discover a beloved teacher stabbed and beaten to death and turn to those who knew her best. The truth proves more tragic than anyone could believe. A movie-style murder plot leads investigators to a killer.

In Connecticut, police hunt down a gunman who has shot at an officer, in Wisconsin, police launch a chase to intercept a driver with stolen plates, and in Florida, Sheriff's K9s are on the trail of a man who viciously assaulted his girlfriend.