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.

Residents of a quaint village are terrified when a local innkeeper and two others are found brutally murdered. Detectives in Maine must follow the depraved killer into the woods at night as he leads them to where he killed and buried a fourth victim.

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 charming 20-year-old wants to help authorities with a murder investigation. He claims to have met one of the three victims and says he has no knowledge of the crime, but detectives suspect otherwise. Could this intellectual be hiding a dark side?

When police question a man in his pregnant ex-girlfriend and her young son's disappearance, they discover he has a terrifying capacity for violence. Later, a seemingly innocuous man searching for a missing girl could be a real-life monster.

A missing Colorado woman's roommate claims she'll do anything to help find her, but investigators fear they may have a rare female psychopath on their hands. Later, a killer's angry outbursts could be real, or just an act put on by a manipulator.

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.

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

An arrogant woman believes she's committed the perfect crime. She is wrong.

An obsession with a web-cam model leads to the annihilation of a family.

A prolific serial killer brags on tape about strangling eight young women.

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.

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.

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.

A heartless gunman shoots a young couple with devastating consequences.

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

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.

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.

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.

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 man crashes into the back of a woman's vehicle early one morning. Officers respond to the scene only to find her car abandoned. Witnesses point to the other driver, and detectives are horrified to discover a sadistic psychopath who admits to murder.

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.

First responders arrive at a home in Ontario where a mother leads officers to the bodies of her two children. An investigation yields the truth: this awful tragedy isn't an accident but a carefully crafted killing by a vengeful psychopath.

A longtime nurse confesses to helping end the lives of numerous elderly patients at multiple nursing homes; detectives discover this is no angel of mercy; behind her unsuspecting persona lies a ruthless psychopath.

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.

Burlington Police get a call that a man killed his girlfriend. At the scene they find the man calm while his girlfriend's body lies nearby. He explains that he has other victims, revealing a history of psychopathic sexual deviancy.

A woman dies in a brutal stabbing at home. Police quickly locate the prime suspect: Antoine Bynum. In his interrogation, he appears to have a psychotic episode until detectives discover it's merely the ruse of a deranged psychopath.

A 17-year-old breaks into his family's cabin and steals a gun before beginning a horrifying road trip through Iowa. When officers catch up with him, a haunting portrait of a burgeoning psychopathic killer emerges.

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.

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.

A woman reports her boyfriend is missing after finding a pool of blood in their apartment. When investigators start their search for answers, they are confronted with a sinister plot hatched by their roommate.

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.

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.

Searchers for a missing woman find her brutally beaten body in a dilapidated house near her home. The case goes cold until a local teen steps forward to reveal that he's not only the killer but also a manipulative psychopath with a thirst for violence.

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.

A man confesses to accidentally killing his best friend while cleaning his gun; during his interrogation, he stuns police by revealing that he’s behind a long trail of bloodshed and is a serial killer who seems to consider himself an angel of mercy.

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.

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.

When a beloved elderly couple disappears on a Sunday afternoon, one person knows their battered lie dead at the bottom of a well; that man is the couple’s son, who lives off his parent’s charity yet takes pleasure in murdering them.

When Omaha, Neb., police officers arrest the driver of a stolen van, he shocks detectives by giving an unsolicited confession to a gruesome murder, and it is only the first of many chilling revelations.

When a priest from Florida goes missing, police focus on a troubled ex-convict whom he helped support; through multiple interrogations, a psychopathic killer reveals details of a twisted vengeance that escalates to a chilling murder.

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

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.

« Previous Ep. Next Ep. » Investigators search a farm for a missing man and find human leg bone on the property. The owner, Susan Monica, admits that her pigs ate her tenant alive, and he's not the only victim. A ruthless psychopath, Monica despises humans but loves her pigs.

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.

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.

Police find a 17-year-old female's dead body in a ditch with two gunshot wounds. The investigation centers on two friends of the victim claiming her death was an accident, but detectives uncover it was a thrill kill carried out by evil psychopaths.

A New Hampshire village is in shock after four adolescents were arrested for robbing and murdering a 42-year-old mother and maiming her 11-year-old daughter. Detectives discover two individuals who are vicious psychopaths rather than ordinary criminals.

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

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.

A frantic graduate student calls 911 to say she just shot her boyfriend in self-defense. Police soon discover that her story doesn't add up and realize they are face-to-face with a remorseless, calculating psychopath.

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 teen plays out his sadistic fantasies of murder on an unassuming drifter.

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.

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.

A concerned mother reports her 24-year-old son missing. He has fallen under the spell of a 47-year-old widowed woman. Detectives soon realize she's a sexual psychopath who has claimed the lives of more than one admirer.

A road rage incident turns deadly as an elderly man is beaten to death by a teenager who claims he was acting in self-defense. Detectives not only find holes in his story but uncover that he is a remorseless and utterly manipulative psychopath.

A mother awakes to find her two sons with their throats cut. Their aunt's boyfriend confesses to his mother, and she wears a wire to capture her son. As he admits his guilt, it's clear how a psychopathic rage led to horrific violence and innocent victims.

Experts explore cases of psychopathic killers known as family annihilators.

On a quiet winter night, a mother finds her 22-year-old son horrifically dismembered in her basement. The lone suspect is the victim's ex-girlfriend, who is at her home in an emotionless state with blood on her hands.

Weeks after an 18-year-old man's friend reports him missing, his clothing turns up burned in a trash can behind a suburban home. When witnesses lead investigators to a young man with a history of violence, they soon learn he had not worked alone.

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.

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.

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

Hikers in Portland discover the badly decomposed body of a raped and strangled young girl. A month later, another woman turns up brutally murdered in same fashion. The prime suspect is a homeless drifter harboring dark sexual fantasies.

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.

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.

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.

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

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

A vindictive psychopathic wife murders her husband.

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

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

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.

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

An impulsive psychopath randomly kills a successful female executive.

Experts explore the anatomy of the key manipulative tactics of psychopaths.

Police engage in a massive manhunt to find a killer on a murder spree of revenge, taking the lives of his girlfriend, cousin, and a man he considers a father figure. Once captured, he proclaims that he simply wants to be "heard."

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.

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.

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.

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

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.

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

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

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

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

Psychopaths live among us. They can be friends, family members, coworkers, or even lovers. Trying as they may to impersonate normal humans, there are always signs that reveal their true nature: calculating, narcissistic -- and sometimes, murderous.

Experts look at a subset of psychopaths who are motivated by their heightened sexual urges and fantasies; this subset of offenders doesn't just enact physical violence but sexual violence toward their victims and is known as the sexual psychopath

A mother, her kids, and friends vanish in a bloody mystery., A slaughtered couple's son disappears. In both cases, young men toy with police, twisting facts and stalling for time. As lives hang in the balance, the truth hides behind lies.

Psychopaths live among us. They can be friends, family members, coworkers, or even lovers. Trying as they may to impersonate normal humans, there are always signs that reveal their true nature: calculating, narcissistic -- and sometimes, murderous.

A female executive's jog ends in murder. Also, DNA links a frail inmate to The Package Killer, a predator who hid women's bodies in alarming ways. As interrogations unfold, two seemingly ordinary men reveal decades of cold, predatory violence.