A 19-year-old woman vanishes, and the suspect is a former high school classmate with whom she had been communicating days earlier. The family is weary, for the suspect has a notorious past filled with sexual deviancy and homicidal urges toward women.

Police respond to a 911 call to find a father of two dead in his home with more than 15 gunshot wounds. Police question the family, but one person is missing, his mother-in-law. Now detectives must determine if this grandma could be a deadly psychopath.

An unapologetic 14-year-old boy confesses to the murder of his best friend. Twelve years later, he's back in court with chance at a reduced sentence. Has this 26-year-old really changed? Or is he the same meticulous, cold-blooded killer he always was?

A man finds his family slaughtered in their West Virginia home. The oldest son, 16-year-old Gavin Smith, is missing, he turns up hiding at his girlfriend's.

While being questioned in the abduction of an Anchorage barista, a young local businessman starts negotiating with investigators to reveal details of a depraved secret life as one of America's most meticulous and psychopathic serial killers.

The "Tourniquet Killer" terrorizes young girls across Houston, Texas. When advances in DNA finally lead to his arrest, this psychopath eagerly confesses to multiple murders.

A failed actor take out his rage on the weakest members of society; after killing four people, a chance encounter with police leads to his downfall; the interrogation room becomes the stage for this killer's final performance.

When a graduate student suddenly goes missing, the family he's staying with immediately contacts police. Then, just days later, a horrific discovery forces investigators to face a rare kind of monster.

A vehicle plows down a 75-year-old military veteran on a country road in an apparent hit-and-run. When a young man confesses to the crime, detectives quickly learn they've encountered a psychopath with an intense desire to thrill kill.

After coming home to find her parents on the floor bleeding, a woman's younger brother claims their father shot their mother before turning the gun on himself.

Traits of psychopath lurk in us all, but for whom does it lead to murder?

A college student disappears at the start of his freshman year without a trace, leaving his family and his girlfriend reeling; when authorities look to his best friend for answers, they uncover a love triangle gone wrong.

A home invasion leads to the revelation of a shocking double life.

A missing person's report leads police to a career criminal and his partner, uncovering a twisted path of illicit schemes, drugs, and exploitation.

After his wife vanishes from Jackson, Missouri., a psychopath plays cat and mouse with detectives.

In rural Wilno, Ontario a vigilante leaves his home on a mission to confront three women who have rejected him over the years. His confession gives investigators picture of a cold-hearted psychopath with a long history of abusing women.

In rural Missouri, police receive a chilling call from a 50-year-old man who claims to have shot three individuals inside his home. Detectives discover that this impulsive massacre had a purpose, and that the culprit is a psychopath obsessed with control.

When women kill, it’s shocking to many of us. However, female psychopaths may not be as rare as we imagine. We’ll examine some of the unique characteristics of female psychopathic killers, and explore the horrific crimes that they’ve committed.

After his conviction for the brutal slaying of his wife, a Florida inmate lays claim to another unsolved murder 17 years prior, revealing that he's a manipulative psychopath with a history of violence and an unquenchable thirst for revenge.

The naked and mutilated body of a mother turns up at the bottom of a ravine in Baton Rouge, Louisiana. When tire tracks lead investigators to a suspect, they encounter an undetected serial killer who confesses to butchering eight women over a decade.

A 911 operator receives a frightening call from a man who claims that he stabbed and killed two people. Police rapidly learn that not only is the call legitimate, but the caller is a violent and unpredictable psychotic.

Pensacola Police are called to the Corner Store when a killer guns down a young man in a brazen public execution in the parking lot. Police track down their suspect and find a cold-blooded psychopath without remorse.

Behind a church lies a dismembered body burned beyond recognition; investigators identify the victim and receive a tip the suspect is a female; a police interview reveals her as the most remorseless psychopathic killer they’ve ever seen.

A 50-year-old woman is found dead in her home. All that's left behind is a note that reads, "Chase me." But when detectives uncover the killer, they quickly discover they have come face to face with a remorseless psychopath.

A heartless gunman shoots a young couple with devastating consequences.

Police respond to the site of a car crash alongside a highway in Grand Rapids, Michigan. Investigators at the scene quickly realize this is no accident, but rather an elaborate cover up for cold-blooded murder by relentless psychopath.

An officer responds to a 911 call placed by a robber on the lam who feels compelled to turn himself in. However, when the officer arrives at the scene, the criminal confesses to much more than breaking and entering.

A psychopathic son wanting control murders his middle-aged parents.

When a young mother goes missing, her husband joins the search while police discover her dismembered body in a stack of bins.

Death row inmate John Hummel agrees to a final interview weeks before his execution.

An impulsive psychopath randomly kills a successful female executive.

Investigators unveil the execution of a loving family, done by a callous psychopathic killer.

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.

For over three decades, Albuquerque police struggle to solve three violent cold cases. After years of searching, the cases break wide open when officers pick up a man on a probation violation. and he soon reveals himself to be a homicidal psychopath.

A mother who calls 911 to report her 32-year-old son is threatening her turns up dead in her home; he becomes the only suspect, and when he turns himself in, his pragmatic retelling of the slaying isn't just cold hearted, it's psychopathic.

Authorities grow concerned when a 25-year-old woman reports her 50-year-old father and 6-year-old daughter missing. Police discover their dead bodies and uncover the shocking truth she is a psychotic killer.

A vindictive psychopathic wife murders her husband.

Every parent's worst nightmare is the possibility that their child has the same evil traits as the most heinous murderers.

A 33-year-old oil rig worker calls 911 to report his girlfriend missing. He seems to be helping in the time-critical hunt to find her. A failed polygraph test leads detectives to suspect this seemingly caring boyfriend is a psychopath.

A young girl disappears, and detectives find a psychopath who duped her.

When a 64-year-old grandmother does not return home from her morning walk, local police uncover that the man responsible for her disappearance is not only a pathological liar but a sexually deviant psychopath carrying out a twisted fantasy.

Detectives reveal an unrepentant psychopath capable of executing the love of his life.

An early morning fire inside an apartment complex reveals the dead bodies of a young woman and an infant boy.

A woman finds her elderly brother dead in his bedroom with his throat slashed. Uncovering the truth poses a challenge for detectives, as the individual responsible for killing him is a manipulative psychopath who craftily deflects blame.

A racially motivated serial killer on death row, who targeted civil rights leader Vernon Jordan and pornography publisher Larry Flynt, confesses to additional unsolved murders with the help of a shrewd female prosecutor.

Police first arrest a man for discharging a firearm and soon discover dead bodies inside his apartment.

A gunman shoots a man dead as he runs along a country road. First responders find a witness standing next to the body with a strange story to tell, and detectives will unravel the lies of a callous psychopath who takes out his frustrations in bloodshed.

Six months pregnant Martine Bernard's family reports her missing, days later, her father vanishes as well. When officers interview Martine's husband, Cassandritz Blanc, they find a calculating psychopath willing to do anything to cover his tracks.

Police catch a break on three St. Louis cold case murders when emerging DNA technology makes a match: a 73-year-old frail man whose harmless facade is hiding a vicious individual.

A man calls 911 with his dying breath, and first responders arrive to find him brutally murdered, stabbed 59 times. When detectives question his best friend, they uncover a tangled, sick story of deception and jealousy that explodes in psychopathic rage.

A killer shoots a young woman dead in her boyfriend's Orlando apartment. Hours later, he turns up in a hospital bed 500 miles away with a gunshot wound and a bizarre story that unravels to reveal he's a lying, callous psychopath.

After a couple's murder, police find a fantasy killing by two psychopaths.

Eleven operators receive a terrifying call from a youngster who claims he stabbed his parents to death. Unsure if the call is a Halloween joke, police rush to the area, only to learn that it is not a fake and that the caller is a budding psychopath.

A crash on a North Dakota highway leaves one passenger dead but the driver unscathed; when investigators see that the victim has stab wounds, they know there was foul play; detectives interrogate the driver.

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.

After a house fire in Texas, suspicion lands on John Hummel when his family's brutally murdered bodies are discovered in the ashes, and he doesn't blink an eye. Now an inmate on death row, he grants a final interview weeks before his execution.