The investigation into a newlywed's disappearance focuses on her job as a CIA employee as a possible clue.

After a former beauty queen and mother of eight is found unconscious in her bathtub following a facelift, her death appears to be an accident; when her doctor husband is caught in a series of deceptions, it raises alarms with investigators.

A small town encounters satanic rituals and a savage killer.

When a loving father is gunned down in upstate New York, a hunt for the gunman crosses state lines; as several suspects are brought in, investigators must determine who's telling the truth to reveal the mastermind.

After moving to a quiet seaside town in Maine, a family experiences a night shattered by a barrage of gunfire.

A small town encounters satanic rituals and a savage killer.

Two Altadena, Calif., families fear for their lives when an LAPD cop moves in next door.

After moving to a quiet seaside town in Maine, a family experiences a night shattered by a barrage of gunfire.

A small town encounters satanic rituals and a savage killer.

A Texas woman discovers her husband's brutally stabbed body in their ransacked home and police suspect he was the victim of a robbery gone wrong, but the investigation reveals a torrid love affair.

A group of adventurous Americans thought they had stumbled into paradise on the warm waters of a tropical hideaway.

A small town encounters satanic rituals and a savage killer.

Two Altadena, Calif., families fear for their lives when an LAPD cop moves in next door.

When a loving father is gunned down in upstate New York, a hunt for the gunman crosses state lines; as several suspects are brought in, investigators must determine who's telling the truth to reveal the mastermind.

A Texas woman discovers her husband's brutally stabbed body in their ransacked home and police suspect he was the victim of a robbery gone wrong, but the investigation reveals a torrid love affair.

The mysterious and near fatal shooting of an America security analyst outside Washington, DC may be linked to the murder of a Russian agent in London.

When a married art teacher is shot to death in her home, police untangle a complex web of relationships, including a three-way affair; Blayne Alexander revisits the twisted motive at the center of this case.

Single mother Nicole Halpin is murdered in her home and her two children witness the attack, but justice will prevail when detectives sift through a list of Nicole's admirers to find her killer.

A group of adventurous Americans thought they had stumbled into paradise on the warm waters of a tropical hideaway.

When a loving father is gunned down in upstate New York, a hunt for the gunman crosses state lines; as several suspects are brought in, investigators must determine who's telling the truth to reveal the mastermind.

A Texas woman discovers her husband's brutally stabbed body in their ransacked home and police suspect he was the victim of a robbery gone wrong, but the investigation reveals a torrid love affair.

The mysterious and near fatal shooting of an America security analyst outside Washington, DC may be linked to the murder of a Russian agent in London.

When a married art teacher is shot to death in her home, police untangle a complex web of relationships, including a three-way affair; Blayne Alexander revisits the twisted motive at the center of this case.

Single mother Nicole Halpin is murdered in her home and her two children witness the attack, but justice will prevail when detectives sift through a list of Nicole's admirers to find her killer.

Top criminal investigators, forensic scientists and behavioral analysts track three serial killers.

After what appears to be a fatal road rage incident, authorities in Clifton, Ariz., follow a trail of recovered text messages that suggest this was no random attack, but instead a cold-blooded murder.

An elite California lakeside community is shaken when two well-to-do gentlemen go to war over a one-inch property line discrepancy; one neighbor takes the dispute to new heights when he hires a hit man to solve the problem permanently.

Top criminal investigators, forensic scientists and behavioral analysts track three serial killers.

A three-year feud over land and morals reaches a bloody conclusion for a young mother in Miami.

An elite California lakeside community is shaken when two well-to-do gentlemen go to war over a one-inch property line discrepancy; one neighbor takes the dispute to new heights when he hires a hit man to solve the problem permanently.

Top criminal investigators, forensic scientists and behavioral analysts track three serial killers.

A prominent private investigator is reported missing after he fails to return from a business trip; when the case goes cold, a former Russian spy assists the FBI in a sting operation to uncover the truth behind his disappearance.

After teenagers Rachel Shoaf and Sheila Eddy are convicted of murdering their 16-year-old friend, Skylar Neese, Skylar's parents discuss the night she disappeared; Rachel Shoaf's therapist, Patricia Bailey, shares her thoughts.

Top criminal investigators, forensic scientists and behavioral analysts track three serial killers.

A three-year feud over land and morals reaches a bloody conclusion for a young mother in Miami.

After what appears to be a fatal road rage incident, authorities in Clifton, Ariz., follow a trail of recovered text messages that suggest this was no random attack, but instead a cold-blooded murder.

A prominent private investigator is reported missing after he fails to return from a business trip; when the case goes cold, a former Russian spy assists the FBI in a sting operation to uncover the truth behind his disappearance.

Police investigate whether the murder of a South Florida attorney is connected to a web of fraud, betrayal and more than $1 billion in missing money.

When a nurse's aide disappears without a trace, detectives learn she was entangled in a complex love triangle. After a tragic discovery in the woods, the investigation points to a sordid affair and a jealous lover looking for revenge.

After a home invasion in Ohio leaves a corrections officer dead, investigators use controlled calls and an undercover sting at a motel to solve the case and expose a cruel plot with a bloody ending.

Three members of a wealthy family are gunned down in their own home; with little evidence to go on, investigators embark on a multi-year surveillance operation to see if they can prove their instincts are correct.

After teenagers Rachel Shoaf and Sheila Eddy are convicted of murdering their 16-year-old friend, Skylar Neese, Skylar's parents discuss the night she disappeared; Rachel Shoaf's therapist, Patricia Bailey, shares her thoughts.

After what appears to be a fatal road rage incident, authorities in Clifton, Ariz., follow a trail of recovered text messages that suggest this was no random attack, but instead a cold-blooded murder.

A prominent private investigator is reported missing after he fails to return from a business trip; when the case goes cold, a former Russian spy assists the FBI in a sting operation to uncover the truth behind his disappearance.

Police investigate whether the murder of a South Florida attorney is connected to a web of fraud, betrayal and more than $1 billion in missing money.

When a nurse's aide disappears without a trace, detectives learn she was entangled in a complex love triangle. After a tragic discovery in the woods, the investigation points to a sordid affair and a jealous lover looking for revenge.

After a home invasion in Ohio leaves a corrections officer dead, investigators use controlled calls and an undercover sting at a motel to solve the case and expose a cruel plot with a bloody ending.

Three members of a wealthy family are gunned down in their own home; with little evidence to go on, investigators embark on a multi-year surveillance operation to see if they can prove their instincts are correct.

When two sisters' husbands turn up dead within weeks of each other, Florida detectives investigate whether the cases are linked.

After a well-known business owner is found dead in his Lake Orion apartment, investigators are left untangling a web of lies to uncover a deadly duo looking to get rich quick.

Texas police investigating the stabbing death of a mother uncover a bizarre scene: poisoned pudding, cell phones submerged in water, and a bathtub rigged for electrocution; in the end, a disturbing plan is revealed, driven by a young love gone wrong.

When a man is shot dead in bed right next to his fiancée, detectives learn that anyone's past can come back to haunt them.

A small town encounters satanic rituals and a savage killer.

Top criminal investigators, forensic scientists and behavioral analysts track three serial killers.

When two sisters' husbands turn up dead within weeks of each other, Florida detectives investigate whether the cases are linked.

After a well-known business owner is found dead in his Lake Orion apartment, investigators are left untangling a web of lies to uncover a deadly duo looking to get rich quick.

Texas police investigating the stabbing death of a mother uncover a bizarre scene: poisoned pudding, cell phones submerged in water, and a bathtub rigged for electrocution; in the end, a disturbing plan is revealed, driven by a young love gone wrong.

When a man is shot dead in bed right next to his fiancée, detectives learn that anyone's past can come back to haunt them.

When 18-year-old Rose Larner vanishes without a trace, detectives in Lansing, Michigan have no evidence and no body.

When a gunman slays an Alabama college student, investigators connect the dots between a mystery man in a black pickup, a confiscated race car, a $100,000 bail bond and betrayal.

A gunman ambushes a striving real-estate mogul in his Arkansas home, shooting the young father between the eyes at close range.

An Oklahoma couple is butchered in their own bed; though sex tapes and racy photos lead to a nudist colony in Kansas, investigators eventually discover a sinister plot much closer to home.

A young mother's disappearance sparks a bitter division among those she leaves behind; as the infighting intensifies, detectives scramble to find out what happened to her, only to discover that a conspiracy to kill is fresh underway.

Police investigating a 911 call for a suicide interview the victim's girlfriend, who claims there's more behind his death; police must determine if an online cult that believes in aliens and reptiles disguised as humans is actually at fault.

A family is desperate to find a daughter who ran off with a strange cult; years later, police are called to a posh mansion near San Diego and are shocked to find 39 bodies in a mass suicide.

When 18-year-old Rose Larner vanishes without a trace, detectives in Lansing, Michigan have no evidence and no body.

When a gunman slays an Alabama college student, investigators connect the dots between a mystery man in a black pickup, a confiscated race car, a $100,000 bail bond and betrayal.

A gunman ambushes a striving real-estate mogul in his Arkansas home, shooting the young father between the eyes at close range.

An Oklahoma couple is butchered in their own bed; though sex tapes and racy photos lead to a nudist colony in Kansas, investigators eventually discover a sinister plot much closer to home.

A young mother's disappearance sparks a bitter division among those she leaves behind; as the infighting intensifies, detectives scramble to find out what happened to her, only to discover that a conspiracy to kill is fresh underway.

Police investigating a 911 call for a suicide interview the victim's girlfriend, who claims there's more behind his death; police must determine if an online cult that believes in aliens and reptiles disguised as humans is actually at fault.

A family is desperate to find a daughter who ran off with a strange cult; years later, police are called to a posh mansion near San Diego and are shocked to find 39 bodies in a mass suicide.

A former cop is moving into a close-knit neighborhood; conflict arises with the whole community over dogs, noise, and other disturbances that keep piling on and ratcheting up until a boiling point is reached, guns are drawn, and blood is spilled.

A former police chief gets into constant conflicts with a young renter who doesn't respect his authority; the war between them intensifies until blood flows down their street.

Complaints about dogs running loose lead to the construction of a fence between two long-time neighbors, but the problem isn't solved and flaring tempers lead to fist fights, stabbings, and ultimately a shocking shootout captured on video.

Kate Johnson, a music education junior, at one of Oregon's prestigious colleges is murdered in her dorm room.

A Fresno family worth millions is gunned down in their suburban home.

A sniper targeting abortion doctors turns murderous and a DNA "needle in a haystack" identifies the gunman.

When 18-year-old Rose Larner vanishes without a trace, detectives in Lansing, Michigan have no evidence and no body.

When a gunman slays an Alabama college student, investigators connect the dots between a mystery man in a black pickup, a confiscated race car, a $100,000 bail bond and betrayal.

A gunman ambushes a striving real-estate mogul in his Arkansas home, shooting the young father between the eyes at close range.

An Oklahoma couple is butchered in their own bed; though sex tapes and racy photos lead to a nudist colony in Kansas, investigators eventually discover a sinister plot much closer to home.

A former cop is moving into a close-knit neighborhood; conflict arises with the whole community over dogs, noise, and other disturbances that keep piling on and ratcheting up until a boiling point is reached, guns are drawn, and blood is spilled.

A former police chief gets into constant conflicts with a young renter who doesn't respect his authority; the war between them intensifies until blood flows down their street.

Complaints about dogs running loose lead to the construction of a fence between two long-time neighbors, but the problem isn't solved and flaring tempers lead to fist fights, stabbings, and ultimately a shocking shootout captured on video.

Kate Johnson, a music education junior, at one of Oregon's prestigious colleges is murdered in her dorm room.

A Fresno family worth millions is gunned down in their suburban home.

A respected family man is found shot to death in his upscale California home. As detectives race to find his killer, a startling confession exposes a web of lies, allegations of abuse, and a marriage pushed to its breaking point.

When droves of young gay men disappear in Indiana in the '90s, an amateur sleuth uncovers clues that point to a likely killer; with little physical evidence, the case stalls until a mind-boggling 10,000 bones are unearthed in a family's backyard.

A sniper targeting abortion doctors turns murderous and a DNA "needle in a haystack" identifies the gunman.

A former police chief gets into constant conflicts with a young renter who doesn't respect his authority; the war between them intensifies until blood flows down their street.

Complaints about dogs running loose lead to the construction of a fence between two long-time neighbors, but the problem isn't solved and flaring tempers lead to fist fights, stabbings, and ultimately a shocking shootout captured on video.

Kate Johnson, a music education junior, at one of Oregon's prestigious colleges is murdered in her dorm room.

When droves of young gay men disappear in Indiana in the '90s, an amateur sleuth uncovers clues that point to a likely killer; with little physical evidence, the case stalls until a mind-boggling 10,000 bones are unearthed in a family's backyard.

A Fresno family worth millions is gunned down in their suburban home.

A respected family man is found shot to death in his upscale California home. As detectives race to find his killer, a startling confession exposes a web of lies, allegations of abuse, and a marriage pushed to its breaking point.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

The family of a former soldier questions whether his death was a tragic coincidence when they learn of a suspicious detail from his wife's past.

In Carmel Canyon, Calif., wealthy neighbors get into disputes over everything from shared roads and bridges to the upkeep of their respective properties until anger boils over, and the ongoing feud is resolved with fatal gunfire.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

Enmity, treachery and gunfire ensue when a man rejects the romantic advances of his next door neighbor.

In Carmel Canyon, Calif., wealthy neighbors get into disputes over everything from shared roads and bridges to the upkeep of their respective properties until anger boils over, and the ongoing feud is resolved with fatal gunfire.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

When a missing man's body is found, his wife finds herself under a microscope; police want to solve the case before it goes cold.

A woman from a small town moves to the big city of Las Vegas, where she finds a new career and a new love, then she vanishes, and her body is found within a few days, but discovering her killer will be a tougher mystery to crack.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

Enmity, treachery and gunfire ensue when a man rejects the romantic advances of his next door neighbor.

The family of a former soldier questions whether his death was a tragic coincidence when they learn of a suspicious detail from his wife's past.

When a missing man's body is found, his wife finds herself under a microscope; police want to solve the case before it goes cold.

When a father goes missing and his body is found in a field several miles away, the investigation reveals multiple suspects - including members of his own family.

The violent murder of a young newlywed in the outskirts of Philadelphia confounds investigators for decades until the perseverance of detectives, combined with new technology, reveals her killer was closer than anyone anticipated.

When sheriff-elect Derwin Brown is gunned down just days before taking office, investigators uncover a tangled web of secrets - forcing them to confront the chilling possibility that the killer may be hiding within law enforcement's own ranks.

A southern California community is gripped by fear when one of its own vanishes without a trace; when a teen disappears, they fear a backyard park has become a hunting ground; a vicious predator must be stopped before it's too late.

A woman from a small town moves to the big city of Las Vegas, where she finds a new career and a new love, then she vanishes, and her body is found within a few days, but discovering her killer will be a tougher mystery to crack.

The family of a former soldier questions whether his death was a tragic coincidence when they learn of a suspicious detail from his wife's past.

When a missing man's body is found, his wife finds herself under a microscope; police want to solve the case before it goes cold.

When a father goes missing and his body is found in a field several miles away, the investigation reveals multiple suspects - including members of his own family.

The violent murder of a young newlywed in the outskirts of Philadelphia confounds investigators for decades until the perseverance of detectives, combined with new technology, reveals her killer was closer than anyone anticipated.

When sheriff-elect Derwin Brown is gunned down just days before taking office, investigators uncover a tangled web of secrets - forcing them to confront the chilling possibility that the killer may be hiding within law enforcement's own ranks.

A southern California community is gripped by fear when one of its own vanishes without a trace; when a teen disappears, they fear a backyard park has become a hunting ground; a vicious predator must be stopped before it's too late.

A serial killer in Spokane, Wash. murders prostitutes and leaves a bag with a smiley face on the victim's head.

When men who helped a "damsel in distress" turn up dead, authorities investigate.

When a man moves to Canyon Country, Calif., he finds himself embroiled in a bizarre and increasingly acrimonious 8-year feud with a neighbor that terminates with blasts from a shotgun.

A serial killer in Spokane, Wash. murders prostitutes and leaves a bag with a smiley face on the victim's head.

A family moves into a Minnesota lake house, then a dispute with a neighbor over water access escalates until it leads to a bloody resolution.

When a man moves to Canyon Country, Calif., he finds himself embroiled in a bizarre and increasingly acrimonious 8-year feud with a neighbor that terminates with blasts from a shotgun.

A serial killer in Spokane, Wash. murders prostitutes and leaves a bag with a smiley face on the victim's head.

Devoted to raising her daughter's child, a loving grandmother is found executed in her own home; police unfold an ongoing custody battle which leads to suspicions towards those nearest to her grandchild.

A young man is crushed by a truck in his father's driveway, leading police to first rule the death as an accident; the case is re-examined.

A serial killer in Spokane, Wash. murders prostitutes and leaves a bag with a smiley face on the victim's head.

A family moves into a Minnesota lake house, then a dispute with a neighbor over water access escalates until it leads to a bloody resolution.

When men who helped a "damsel in distress" turn up dead, authorities investigate.

Devoted to raising her daughter's child, a loving grandmother is found executed in her own home; police unfold an ongoing custody battle which leads to suspicions towards those nearest to her grandchild.

Investigators look for answers when a popular school superintendent is found dead in his western New York home.

When a young entrepreneur is shot and dumped in a rural well outside Atlanta, detectives search frantically for clues as to who committed the horrific murder.

Twenty women are deceived into believing their would-be suitor is worth millions, and made to look like gold diggers in front of 70m viewers.

The Sheik's family and those who survived his hardcore bloodbaths reveal his career, which spanned fifty years.

A young man is crushed by a truck in his father's driveway, leading police to first rule the death as an accident; the case is re-examined.

When men who helped a "damsel in distress" turn up dead, authorities investigate.

Devoted to raising her daughter's child, a loving grandmother is found executed in her own home; police unfold an ongoing custody battle which leads to suspicions towards those nearest to her grandchild.

Investigators look for answers when a popular school superintendent is found dead in his western New York home.

When a young entrepreneur is shot and dumped in a rural well outside Atlanta, detectives search frantically for clues as to who committed the horrific murder.

Twenty women are deceived into believing their would-be suitor is worth millions, and made to look like gold diggers in front of 70m viewers.

The Sheik's family and those who survived his hardcore bloodbaths reveal his career, which spanned fifty years.

Officials look to state-of-the-art DNA analysis to help capture a serial killer in the Louisiana State University area of Baton Rouge.

A young man ends up dead while out hunting; investigating whether this is a case of an accidental shooting, or if there is a more sinister explanation.

In Elyria, Ohio, two neighboring families live in harmony for decades, then their friendly coexistence devolves into acrimony, accusations and violence.

Officials look to state-of-the-art DNA analysis to help capture a serial killer in the Louisiana State University area of Baton Rouge.

When family members fall ill from deadly poison found in their soda, investigators turn their attention to the quiet couple who live next door.

In Elyria, Ohio, two neighboring families live in harmony for decades, then their friendly coexistence devolves into acrimony, accusations and violence.

Officials look to state-of-the-art DNA analysis to help capture a serial killer in the Louisiana State University area of Baton Rouge.

An Arizona socialite makes a gruesome discovery, which leads local law enforcement to ask questions about her troubled marriage; she claims she found a man dead, but police have reason to believe otherwise.

Two Tulsa brothers fight for more than 20 years to prove their innocence after they were wrongfully convicted for separate murders.

Officials look to state-of-the-art DNA analysis to help capture a serial killer in the Louisiana State University area of Baton Rouge.

When family members fall ill from deadly poison found in their soda, investigators turn their attention to the quiet couple who live next door.

A young man ends up dead while out hunting; investigating whether this is a case of an accidental shooting, or if there is a more sinister explanation.

An Arizona socialite makes a gruesome discovery, which leads local law enforcement to ask questions about her troubled marriage; she claims she found a man dead, but police have reason to believe otherwise.

After a tech millionaire's neighbor is found murdered, he goes on the run and plays a high-stakes game of hide-and-seek with the authorities and the press.

An elderly socialite is reported missing from her stately New York City brownstone; when Sante Kimes and her son Kenny are arrested, an investigation reveals decades of crime, deception and murder that captivated the nation.

San Diego detectives investigate the deaths of a young woman and her 10-month-old child.

On the edge of divorce, a couple's argument over custody turns deadly; the husband claims he killed his wife in self-defense when she attacked him with scissors, but a look into his past holds a deadly secret.

Two Tulsa brothers fight for more than 20 years to prove their innocence after they were wrongfully convicted for separate murders.

A young man ends up dead while out hunting; investigating whether this is a case of an accidental shooting, or if there is a more sinister explanation.

An Arizona socialite makes a gruesome discovery, which leads local law enforcement to ask questions about her troubled marriage; she claims she found a man dead, but police have reason to believe otherwise.

After a tech millionaire's neighbor is found murdered, he goes on the run and plays a high-stakes game of hide-and-seek with the authorities and the press.

An elderly socialite is reported missing from her stately New York City brownstone; when Sante Kimes and her son Kenny are arrested, an investigation reveals decades of crime, deception and murder that captivated the nation.

San Diego detectives investigate the deaths of a young woman and her 10-month-old child.

On the edge of divorce, a couple's argument over custody turns deadly; the husband claims he killed his wife in self-defense when she attacked him with scissors, but a look into his past holds a deadly secret.

Investigating a series of fires in California's Sam Joaquin Valley that killed four, investigators determine a respected arson investigator may be the arsonist.

A young man is brutally murdered, and a woman is found covered in blood just hours later; she is adamant that she is innocent, and later a twist in the case shocks everyone involved.

A couple moves to an idyllic California beach town and hits it off with their new neighbors, then one of the wives descends into drugs and madness, terrorizing the other.

Investigating a series of fires in California's Sam Joaquin Valley that killed four, investigators determine a respected arson investigator may be the arsonist.

When neighbors stand up to a bully after his dog bites their son, a grudge he's been nursing for decades finally explodes into a frenzy of violence.

A couple moves to an idyllic California beach town and hits it off with their new neighbors, then one of the wives descends into drugs and madness, terrorizing the other.

Investigating a series of fires in California's Sam Joaquin Valley that killed four, investigators determine a respected arson investigator may be the arsonist.

After a home invasion in Ohio leaves a corrections officer dead, investigators use controlled calls and an undercover sting at a motel to solve the case and expose a cruel plot with a bloody ending.

A couple goes on a scuba-diving vacation in the British Virgin Islands; one of them surfaces but the other does not.

Investigating a series of fires in California's Sam Joaquin Valley that killed four, investigators determine a respected arson investigator may be the arsonist.

When neighbors stand up to a bully after his dog bites their son, a grudge he's been nursing for decades finally explodes into a frenzy of violence.

A young man is brutally murdered, and a woman is found covered in blood just hours later; she is adamant that she is innocent, and later a twist in the case shocks everyone involved.

After a home invasion in Ohio leaves a corrections officer dead, investigators use controlled calls and an undercover sting at a motel to solve the case and expose a cruel plot with a bloody ending.

Kay Mortensen took pride in preparing for every possible threat, so when he was found dead at home, those who knew him were stunned; the brutal killing put two of Kay's loved ones behind bars and in danger, but the truth may set them free.

World-renowned snake breeder Ben Renick is found shot to death in a facility crawling with reptiles; Andrea Canning reflects on a crime scene unlike any she's ever seen, where the initial suspect was a 600-pound anaconda.

When 78-year-old Ina Gross is viciously murdered, suspicion falls on one of her own children; the siblings stand together until the truth is revealed.

A couple goes on a scuba-diving vacation in the British Virgin Islands; one of them surfaces but the other does not.

A young man is brutally murdered, and a woman is found covered in blood just hours later; she is adamant that she is innocent, and later a twist in the case shocks everyone involved.

After a home invasion in Ohio leaves a corrections officer dead, investigators use controlled calls and an undercover sting at a motel to solve the case and expose a cruel plot with a bloody ending.

Kay Mortensen took pride in preparing for every possible threat, so when he was found dead at home, those who knew him were stunned; the brutal killing put two of Kay's loved ones behind bars and in danger, but the truth may set them free.

World-renowned snake breeder Ben Renick is found shot to death in a facility crawling with reptiles; Andrea Canning reflects on a crime scene unlike any she's ever seen, where the initial suspect was a 600-pound anaconda.

When 78-year-old Ina Gross is viciously murdered, suspicion falls on one of her own children; the siblings stand together until the truth is revealed.

Investigators work to solve a double homicide in the small town of Hudson, Wisc.

An investigation into the disappearance of an Arkansas couple leads a law enforcement team on a manhunt through the rugged terrain of the Ozarks and into unforeseen danger.

When a freewheeling family moves from California to the conservative enclave of Leesburg, Va., they get on the wrong side of one of their neighbors, and the conflict escalates until bullets fly and blood flows in the street.

Investigators work to solve a double homicide in the small town of Hudson, Wisc.

Seeking to make a fresh start in Las Vegas, a teacher and her son find themselves the targets of harassment and escalating intimidation by the woman who lives next door.

When a freewheeling family moves from California to the conservative enclave of Leesburg, Va., they get on the wrong side of one of their neighbors, and the conflict escalates until bullets fly and blood flows in the street.

Investigators work to solve a double homicide in the small town of Hudson, Wisc.

When a revered fire lieutenant is gunned down in his driveway, detectives navigate stories of a long-standing neighborhood feud and a surprise cancer scare to piece together a conspiracy plot involving young pawns manipulated by a cunning mastermind.

A couple seems made for each other, but a secret is uncovered, and their passion turns into violence, then an elaborate plot is hatched to get revenge.

Investigators work to solve a double homicide in the small town of Hudson, Wisc.

Seeking to make a fresh start in Las Vegas, a teacher and her son find themselves the targets of harassment and escalating intimidation by the woman who lives next door.

An investigation into the disappearance of an Arkansas couple leads a law enforcement team on a manhunt through the rugged terrain of the Ozarks and into unforeseen danger.

When a revered fire lieutenant is gunned down in his driveway, detectives navigate stories of a long-standing neighborhood feud and a surprise cancer scare to piece together a conspiracy plot involving young pawns manipulated by a cunning mastermind.

A teenage mom and her friends get caught up in a bizarre murder case.

When authorities learn an Ohio woman has been missing for nearly half a year, all signs point to foul play. After tracking the victim's bank cards across the country, detectives zero in on a couple trying to outrun their vicious secret.

An investigation into the disappearance of an Arkansas couple leads a law enforcement team on a manhunt through the rugged terrain of the Ozarks and into unforeseen danger.

A beloved entrepreneur is murdered in his office; a secret double life is quickly revealed, and despite mountains of suspicion, lies and motives, his killer is not who one would assume.

A couple seems made for each other, but a secret is uncovered, and their passion turns into violence, then an elaborate plot is hatched to get revenge.

An investigation into the disappearance of an Arkansas couple leads a law enforcement team on a manhunt through the rugged terrain of the Ozarks and into unforeseen danger.

When a revered fire lieutenant is gunned down in his driveway, detectives navigate stories of a long-standing neighborhood feud and a surprise cancer scare to piece together a conspiracy plot involving young pawns manipulated by a cunning mastermind.

A teenage mom and her friends get caught up in a bizarre murder case.

When authorities learn an Ohio woman has been missing for nearly half a year, all signs point to foul play. After tracking the victim's bank cards across the country, detectives zero in on a couple trying to outrun their vicious secret.

An investigation into the disappearance of an Arkansas couple leads a law enforcement team on a manhunt through the rugged terrain of the Ozarks and into unforeseen danger.

A beloved entrepreneur is murdered in his office; a secret double life is quickly revealed, and despite mountains of suspicion, lies and motives, his killer is not who one would assume.

When a devoted father is found brutally stabbed to death in his Florida home, detectives turn their focus to the picture-perfect family who appear to have it all.

After a Georgia father is discovered bludgeoned by a hammer in his own bedroom, it takes years for detectives to nail down if this murder is connected to a series of online romances or a case of mistaken identity.

When RV-lifestyle couple James and Michelle Butler go missing while camping along the southern coast of Texas, the discovery of human remains leads authorities to embark on an international manhunt to bring the fugitives to justice.

A young mother is murdered but despite unique evidence at the scene, it takes years to put the pieces together and bring her killer to justice.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

A serial killer in Spokane, Wash. murders prostitutes and leaves a bag with a smiley face on the victim's head.

When a devoted father is found brutally stabbed to death in his Florida home, detectives turn their focus to the picture-perfect family who appear to have it all.

After a Georgia father is discovered bludgeoned by a hammer in his own bedroom, it takes years for detectives to nail down if this murder is connected to a series of online romances or a case of mistaken identity.

When RV-lifestyle couple James and Michelle Butler go missing while camping along the southern coast of Texas, the discovery of human remains leads authorities to embark on an international manhunt to bring the fugitives to justice.

A young mother is murdered but despite unique evidence at the scene, it takes years to put the pieces together and bring her killer to justice.

A violent home invasion in Sugar Land, Texas, leaves two members of the Whitaker family wounded and two others dead; investigators suspect a burglary gone wrong, but the truth is darker than anyone could have imagined.

In an affluent New Mexico oil town, family man and former US Marine Darrell Blagg is gunned down just inside his back door; investigators are convinced his distraught wife and two grieving sons know more than they're willing to share.

From grieving family and friends to jilted lovers and eyewitnesses, investigators pore over every detail and discrepancy to uncover motives for murder, along with the reason for suppressing key pieces of evidence.

Just hours into the New Year in Toronto, Canada, young father Michael Pimentel is stabbed to death on the street; witnesses describe two assailants; it will take years and a Twitter campaign to ultimately crack the case.