Friends think something isn't right after the mysterious disappearance of a Colorado rancher and spend years fighting for answers.

To keep their marriage fresh, a young couple turns to a life of sex games and sharing spouses, but when threesomes and foursomes lead to murder, investigators struggle to prove who killed this swinger.

A lover's quarrel and a quick cash scheme lead to the murder of a happy retiree; the Hollywood community is stunned when a body is found under its most famous landmark.

A single mother becomes a murder victim while living a double life; a web of deception, sex and murder sends detectives on a multi-year hunt to figure out who could have murdered her.

A high-speed car chase ends with a 40-year-old newlywed shot dead in front of her husband and stepdaughter; is this a robbery gone wrong, a gang ordered hit, or something more sinister.

Kelly Siegler and Johnny Bonds investigate the twisted murder of a new grandmother who was strangled and set on fire in an abandoned school bus; things get personal when the primary suspects turn out to be Kelly's neighbors.

Kelly and Steve Spingola investigate the brutal slaying of an Oklahoma teenager whose night of cruising and partying turned deadly; a scandalous town rumor could have led to her death; the team searches for justice 22 years later.

Kelly and Tonya head to Wyoming to work with Carbon County Law Enforcement to look into the mysterious deaths of two women years apart, but connected by the same circle of friends.

In part two of their investigation, the Cold Justice team continues to investigate three mysterious deaths in Wyoming, hoping they will be able to finally give answers to all the families involved.

The "Cold Justice" team investigates the mysterious death of a pregnant mother whose skull was found on a wooded mountain; with multiple suspects and conflicting stories, can they uncover the truth and get justice for her and her unborn child?

Kelly and Steve team up with the Clinton County Sheriff's Office to solve the heartbreaking cold case of a young mother who vanished, leaving only her wedding rings behind; did she walk away, or was she murdered?

When an unknown body surfaces in the icy East River, Barbara Butcher joins detectives in a race to reconstruct the victim's identity using the few fragile clues left behind; pressure mounts when a report comes in that there may be more victims.

The "Cold Justice" team tackles the disappearance of a loving mother who allegedly disappeared during a family vacation; the investigation uncovers evidence that she never left town alive.

Kelly and Steve team up with the Clinton County Sheriff's Office to solve the heartbreaking cold case of a young mother who vanished, leaving only her wedding rings behind; did she walk away, or was she murdered?

When an unknown body surfaces in the icy East River, Barbara Butcher joins detectives in a race to reconstruct the victim's identity using the few fragile clues left behind; pressure mounts when a report comes in that there may be more victims.

Dawn Sandoval is hoping to start over after a recent divorce, but as soon as she dives into the dating world she vanishes into thin air, leaving behind a mystery in the New Mexico desert that ends with a horrifying discovery.

Keiona Braxton excitedly awaits the birth of her first child, but when detectives are called to her burning apartment, they uncover a scene of unparalleled violence and use the clues on Keiona's own body to point them to the killer.

Lead detectives break their silence on the investigation into once-prominent South Carolina attorney Alex Murdaugh.

Lead detectives break their silence on the investigation into once-prominent South Carolina attorney Alex Murdaugh.

In an effort to uncover the truth, a group of Detroiters band together to clear the names of Tommy and Ray Hughes who have spent 25 years in prison for a murder they say they did not commit.

When a pediatric dentist is found dead, police uncover a complex plot and their suspect leads investigators on an international manhunt; the lead detective speaks out for the first time.

When a pediatric dentist is found dead, police uncover a complex plot and their suspect leads investigators on an international manhunt; the lead detective speaks out for the first time.

The trial of Scott Peterson who was convicted for the murder of his wife and unborn child.

An in-depth look at the complexities of the case against Aileen Wuornos, the woman branded as America's first female serial killer; questions still revolve around her claim of self-defense and whether or not she got the justice she deserved.

The life and crimes of master manipulator, Drew Peterson.

Police believe nurse Kristen Gilbert may have committed up to 60 murders at a hospital in Massachusetts; some say an affair drove Gilbert to murder while others think her narcissism caused the death of these innocent patients.

Colleen Stan relives what it was like to be kidnapped and imprisoned in a box, and how she escaped.

In the 1970s, Ted Bundy murders at least 36 young women; glamorized as a handsome, well-educated killer who outsmarted the law, Bundy may have been an evil genius or a con artist posing as privileged to hide the monster in plain sight.

Self-named killer B.T.K. murders 10 people over 17 years, all while taunting Wichita, Kan., police and media before being exposed as family man and churchgoer Dennis Rader; in an exclusively acquired interview, he reveals what drove him to do it.

The stories of five women who suffered vile abuse while trapped inside the home of a prolific serial killer from which they eventually escaped.

From 1993 to 2000, the quiet community of Fort Smith, Ark., is terrorized by a twisted serial killer, a deranged necrophiliac who targets elderly and vulnerable women; he becomes known as The River Valley Killer.

The man known as the Happy Face Killer viciously strangled eight women and dumped their bodies along the road.

A devoted mother is found shot to death in her minivan; the case stays cold until old memories resurface and new revelations come to light, dividing her Florida family.

A devoted mother is found shot to death in her minivan; the case stays cold until old memories resurface and new revelations come to light, dividing her Florida family.

A woman is found murdered in the remains of a house that has burned to the ground, and it will take years to unravel the mystery of what happened to her.

The murder of a local café owner leads a small-town police force to uncover a diabolical scheme fueled by scandalous temptation.

A jealous teenager's brash act of violence thrusts a shadowy affair into the national spotlight; the surviving victim, Mary Jo Buttafuoco, sheds light on her side of the scandal that rocked America.

When the body of a beloved aircraft machinist is found stuffed in the trunk of his own car, investigators follow a trail of deception to a manipulative killer.

In the fall of 2011, homicide detectives in towns over 200 miles apart connect two separate murders to one ruthless killer.

When the owner of an Ohio landscaping company is found shot to death in his bed, the ensuing investigation exposes an elaborate web of sex, obsession, and power.

In Gig Harbor, Wash., a homicide investigation reveals the dark lengths to which one woman will go for her family's safety.

A contentious divorce and custody battle lands one father in the crosshairs of a sniper.

When a man returns home from a party and finds his caregiver shot to death, detectives must sift through a complicated network of animosity and resentment to find their killer.

The murder of a benevolent owner of a landscaping business sends shockwaves through small Ohio town.

When a charred human torso is discovered on a Native American reservation in Montana, local and federal investigators join forces to piece together a heinous crime.

When the bodies of two grandparents are tragically found left for dead, investigators toil to determine whether the slayings were motivated by simmering vengeance or insatiable greed.

When medical examiners determine that a terminally ill Arizona man may have not died from natural causes as his family previously thought, a homicide investigation begins to unravel the truth.

The disappearance of a Michigan man triggers a tragic chain of events that ends in another man's death nearly 400 miles away.

An investigation into the murder of a small-town bus driver exposes secrets behind closed doors.

An investigation into the disappearance of an Iowa mother sends police in two states on a wild journey, during which they encounter a volatile love triangle, stolen identity, arson, and a relentless stalker.

The discovery of a charred body in the bed of a burning pickup truck ignites a homicide investigation in Atlanta, Georgia.

When a pair of Amish teenagers on horseback come across a man's body in a field, detectives in southern Michigan work to piece together an atrocious crime.

Two young boys are left fatherless when an Air Force sergeant is gunned down by a pair of intruders in his San Antonio home.

An investigation into the heinous murder of a college student in Las Vegas ignites an international manhunt and exposes a lethal love triangle.

When an unknown body surfaces in the icy East River, Barbara Butcher joins detectives in a race to reconstruct the victim's identity using the few fragile clues left behind; pressure mounts when a report comes in that there may be more victims.

Kelly and Steve team up with the Clinton County Sheriff's Office to solve the heartbreaking cold case of a young mother who vanished, leaving only her wedding rings behind; did she walk away, or was she murdered?

A trail of texts helps prosecutors build a case in the disappearance of Kevin Mengel, but a surprise awaits them.

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 couple's romance on Nantucket Island turns tragic.

When two female college students go missing, their whereabouts remain unknown for months, until a parole officer recalls startling information that would lead investigators to the backyard of a remote property.

After a homeowner randomly uncovers human remains while doing yard work in his California backyard, a homicide detective enlists the help of a local veterinarian to solve the murder.

A man asks investigators to help track down his missing father, ultimately sending them on a lengthy game of cat-and-mouse that results in horrific discoveries in two backyards.

After a husband and wife realize their dogs have been dragging human bones into their backyard, cops learn that a serial killer is using the nearby woods to indulge in his dark fantasies.

When the body parts of two missing teens are found in a backyard cornfield, Ohio detectives uncover dark family secrets; the community fears there may never be justice when the man convicted of the crime is released from prison.

When a construction worker unearths human remains in the backyard of an old farmhouse, it sets off a baffling 15-year missing person's case and leaves detectives searching for long-buried secrets and overdue justice.

A young pastor grieves after his wife dies in a house fire, but when shocking secrets are revealed, a community is shattered; a look at whether or not a prophecy could have predicted her death.

A frantic woman calls 911 saying her boyfriend shot himself, but the story keeps changing; it takes a risky gambit to unravel the truth.

A beautiful young woman is found in her locked apartment with 20 stab wounds; the medical examiner classifies her death as murder but later changes the ruling to suicide, a decision that forces her family into the fight of their lives.

First responders are called to the fatal shooting of a 28-year-old woman; while her estranged husband claims their bizarre sex game ended in suicide, investigators and the victim's family believe the case to be a cold-blooded murder.

Identical twin sisters are involved in a horrific crash on the island of Maui; one sister miraculously survives after their car plunges over the side of a cliff; questioning if this was a tragic accident or something more ominous.

A man discovers the body of his fiancee with an apparent self-inflicted gunshot wound; her death is ruled a suicide, but authorities are puzzled when they can't find the fatal bullet; then, the discovery of the bullet turns the case upside down.

When evidence shows a woman's rape and murder, police must find the killer as well as the victim.

A week after a couple disappears from the beach, police get a mysterious lead from a robbery.

Fifteen years later, DNA technology leads to justice for a murdered woman and her savagely beaten 4-year-old daughter.

A quiet waitress who hasn't been to work in two days vanishes without a trace; police suspect a date gone wrong.

The search for a missing exotic dancer led police to an isolated 75-acre site where someone had been shot and cremated, thus destroying all evidence... almost; piece of a foot provided enough DNA for a genetic profile and positive ID.

When a man perishes in a fire while working in his garage, his death is initially ruled an accident until a forensic odontologist changes the direction of the case.

Lack of evidence compels investigators to look beyond the obvious when a woman is beaten to death at her in-laws house.

A man is found dead of an apparent suicide. But soon after, information emerges which reveals a much more menacing scenario.

A dismembered body is dumped on the side of the New Jersey Turnpike and before police realize it, bodies are turning up between two states.

A young bride-to-be is gunned down in her own home. The attack is personal and as investigators start digging, they uncover the man she loved was living a lie.

Tara Munsey went missing after a work shift at a Virginia restaurant and it is unknown if she ran away or if she was the victim of foul play.

An Ohio woman and her two daughters go missing while vacationing in Florida; their corpeses are found floating in Tampa Bay with a hand-written note by one of the victims; putting it on five billboards helps them find the killer.

Four young adults are murdered in an affluent Texas neighborhood, with little evidence but two people walking by dressed in black.

A young college student is found dead in her apartment and the autopsy rules the death a homicide by an unknown male suspect.

A woman is found dead in an elevator, but her murder is just the beginning; as Barbara Butcher retraces the chain of evidence, she uncovers a domino effect of violence that leaves a trail of bodies across the Bronx.

When an unknown body surfaces in the icy East River, Barbara Butcher joins detectives in a race to reconstruct the victim's identity using the few fragile clues left behind; pressure mounts when a report comes in that there may be more victims.

When former Sen. Linda Collins of Arkansas is found fatally stabbed outside her home, detectives investigate if her murder is connected to her political career or her personal life; the victim's children speak out about the case.

When former Sen. Linda Collins of Arkansas is found fatally stabbed outside her home, detectives investigate if her murder is connected to her political career or her personal life; the victim's children speak out about the case.

A husband gives a frantic call to 911 after finding his wife dead in a bathtub, but the couple's daughters lead police to investigate their father.

When a hockey player and a single mom are found dead in an upscale Newport Beach, Calif., condo, loved ones have no idea how they knew each other; the discovery of a link to another area attack launches the race to catch a killer.

A young woman tells her mom she's going out for a night with friends and never returns home in a puzzling case that went cold for nine heartbreaking years; until a shocking confession breaks the case wide open and exposes the brutal missing piece.

When a wealthy churchgoing woman is found murdered in her bedroom just a week before Christmas, investigators initially believe this is a robbery gone wrong; the painstaking investigation, however, uncovers a killer much closer to home.

Investigators working on the cold case murder of a beloved Orange County millionaire uncover a box of old tape recordings that reveal long-buried secrets, leading them on a path to finally nail the killer.

When a millionaire playboy is found burned to death inside his Buckhead mansion, investigators must navigate a love triangle to find the killer.

The Atlanta club scene is shaken when the wife of a popular DJ is executed in her sleep; detectives must determine if the victim had any enemies or if her murder was part of a string of killings stemming from her husband's high-profile job.

A woman in an exclusive Atlanta neighborhood is shot in her bedroom while calling 911; when detectives investigate the crime, they discover that her murder is related to an elaborate crime ring that upends the sense of safety in this tranquil hamlet.

When the body of an Atlanta police lieutenant is discovered floating in a lake and riddled with bullets, detectives work tirelessly to bring justice to their fallen comrade.

Linda Watson is a single mom raising a beautiful daughter when she disappears; then, suddenly, Linda's mom goes missing too, along with another friend; police are convinced the three cases are connected, but unraveling the mystery takes years.

She was an A-lister in a town famous for glitzy ski resorts and celebrities; when socialite Nancy Phister was murdered, the news reverberated around Aspen; Nancy had a long list of friends, but she also had enemies.

A high-society hustler with a flair for spinning lies, the con man known as Clark Rockefeller is accused of murder; to solve the mystery, cold-case detectives begin to retrace his steps along a decades-old trail of deceit.

Two years after the disappearance of his wife, Josh Powell kills his two sons and himself.

She was a small-town girl from rural Wisconsin; he was a Chicago superstar, a hometown hero with the legendary Bears; together, they were expecting their first child, but no one was expecting their tale to end in the deadly way that it did.

A young woman is abducted in Ecuador, and as her family and investigators race to save her, she plots to save herself; her daring plan involves a little something hidden at the bottom of her bag, but time is running out.

A small-town girl moves to Las Vegas, where she finds a new career and new love; soon after, however, she vanishes, and within days, police find her body; finding who killed her will be a tougher mystery to crack.

Brooke Wilberger was 19 when she was kidnapped; her family begged for her return, but months passed before police got their first break, a similar attack more than 1,000 miles away.

The murder of a young businessman in the Old San Juan district of Puerto Rico marks the start of a 15-year-long hunt to find the killer.

After a plastic surgeon and local musician is murdered in his Asheville, N.C., home, investigators uncover a trail of clues pointing to an unlikely killer; new details emerge from exclusive TV interviews with insiders close to the case.

After a plastic surgeon and local musician is murdered in his Asheville, N.C., home, investigators uncover a trail of clues pointing to an unlikely killer; new details emerge from exclusive TV interviews with insiders close to the case.

Karen Smith is murdered while her 5-year-old son is brutally stabbed and a neighbor says she knows who did it; she later recants her testimony and fights for the suspect's defense.

It's a night like any other at the local bar in the village of Whitehouse, Ohio, until a kiss sets off a domino effect that turns deadly; investigators sift through patrons only to find their suspect list growing longer by the hour.

A night of Christmas Eve merriment in the Louisiana bayou ends in murder when one of a local bar's most beloved sons is found in a pool of his own blood.

A night of soccer and celebration turns tragic when one young Orlando City soccer fan is found dead at home the next day; police are left with a field of suspects and very few answers.

A lavish wedding at a mountain lodge ends in tragedy when two people are shot in their cabin; a mysterious stranger who seems to have vanished into thin air could hold the key to the shooting.

The murder of a New Jersey entrepreneur leaves investigators stumped until months later, when a drug bust brings to light a murder plot riddled with greed, addiction and betrayal.

The suspicious shooting of a delivery truck driver shrouds the Sunshine State in darkness.

When the decaying body of a Baltimore man is discovered in his garage, detectives use advanced law enforcement technology to pinpoint a cunning killer.

The peace of an Indiana town is interrupted on Valentine's Day 2003, when police receive a report of a violent murder.

Against all odds, a young woman survives a brutal attack on her and a friend in a park, and while DNA points one way, a bombshell message points another.

Keith Morrison looks back on this haunting mystery he reported on for more than 10 years; a pilot flees following a plane crash, becomes a fugitive and lives a double life for decades.

A couple made a fortune in gold but were headed for divorce when she was murdered; how she is killed makes this case unforgettable for Josh Mankiewicz; a video that seems to provide an alibi ends up pointing police to the killer.

A beautiful college student goes missing from her off-campus job, and a week later, investigators receive a mysterious phone call that reveals her plight.

Andrea Canning reflects on a cautionary tale that still inspires her; a man steals millions of dollars conning women and businesses over 25 years; one woman brings together a group of his victims to hold him accountable and face justice.

Josh Mankiewicz wants to return to this case because the very thing Christina Morris feared most became her living nightmare; she goes out with friends and vanishes; the police question everyone, hoping the truth will lead them to her body.

Andrea Canning reflects on a story that hits close to home for her because of where it takes place; a South Carolina coroner arrives at the scene of a car accident to find his friend deceased and begins to think her death looks suspicious.

Venus Stewart stepped outside her door and vanished; investigators suspected her ex, but he had an alibi; a video gamer's tale had detectives seeing double and exposed the truth.

Josh Mankiewicz returns to a case that took six years to report; a woman is found murdered after her friend hears her screaming on the phone, but the case sits cold until the mysterious death of her boyfriend's twin brother leads police to a suspect.

The investigation into a deadly home invasion involving a local business owner takes a turn when an unlikely witness comes forward; new details emerge from exclusive interviews and never-before-seen police interviews.

The investigation into a deadly home invasion involving a local business owner takes a turn when an unlikely witness comes forward; new details emerge from exclusive interviews and never-before-seen police interviews.

Hollywood actress Aasha Davis' sister, Lesley, goes missing after a fight with her husband never to be heard from again.

On a bone-chilling January morning, when a 39-year-old day care owner goes missing, her fiance finds her wallet, keys and phone still in the house they share; the mystery deepens when the K9 unit searches the home but finds no trace of her.

Criminology student Imette St. Guillen was dedicating her life to catching killers when she herself was caught by one while celebrating her birthday late at night at a bar in lower Manhattan.

Millionaire banker and mother-of-two Shele Covlin had it all, until she fatally slipped and fell in her Upper West Side bathtub; days after her burial, information emerges, and the NYPD realizes this may be no accident.

Realtor to the stars Linda Stein is found bludgeoned to death in her apartment, but her larger-than-life personality meant Linda made enemies as well as admirers; with evidence from the crime scene, only painstaking sleuthing can identify her killer.

While investigating the murder of a man who was gunned down in his delivery truck, police in California uncover an affair with deadly repercussions.

When a mother of two is found floating in a creek, investigators in Tennessee work to untangle a twisted murder plot.

While investigating a tragic murder, Wisconsin police must work their way through a complex web, spanning across the nation, with alleged mafia ties and scandalous text messages.

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.

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.

After a man is shot just a few feet inside his New York home, the ensuing investigation brings to light a murder-for-hire plot spurred by greed.

When police searching for a missing Indiana man discover a body on a riverbank, they launch an investigation that unearths a surprising story of an open marriage and evidence of a brutal torture.

Police in a small Pennsylvania town respond to an eyewitness report of a murder behind a grocery store and find that the victim is no stranger to law enforcement.

When a young mother is executed and her family critically injured, investigators piece together haunting clues and an earlier murder to capture deranged killers with a spiritual calling.

After a young mother disappears with a woman claiming to be a social worker, an investigation into her whereabouts ends in a gruesome discovery.

A family recovering from a devastating loss is hit with another when a man finds his sister stabbed to death in her living room.

When newlyweds are gunned down outside a Texas church, small town cops realize they know the victims as they uncover a murder plot fueled by twisted family ties.

A powerful lawyer and his new bride are slain; detectives try to track down a scorned socialite, and they unearth twisted tales of adultery, restraining orders and alleged abuse.

A family's life is turned upside down when a ghost from their past returns for revenge.

A teenage boy discovers a real-life horror scene in his home on Halloween morning; investigators must determine if the triple homicide is a random act of evil or a premeditated slaughter by someone close to the family.

After a single young mother fails to show up for work on Halloween, her family and friends suspect murder.

The murders of two young women near a Phoenix canal remain unsolved for over 20 years until a team of cold case detectives take on the case and investigate a man known as the Zombie Hunter.

The murders of two young women near a Phoenix canal remain unsolved for over 20 years until a team of cold case detectives take on the case and investigate a man known as the Zombie Hunter.

Out with his fiance on Halloween, a man leaves a bar with the rowdy crowd behind him and is never seen again.

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

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

It is common for long-haul truck driver Lloyd Ford to be gone for stretches, and when he disappears, it doesn't raise many flags; at least two people know where he is, and they guard the secret for 27 years, but the truth is about to be revealed.

When hikers find a 21-year-old UCLA student's body in a Los Angeles-area train tunnel, detectives wonder if his interest in an alternative religion is connected to his murder.

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

A wealthy entrepreneur is shot in his home; there are many suspects but with only suspicion to go on, it takes investigators over seven years to nab his killer.

Lust and greed are at the core of the case of a wife and mother who is found dead in her pool; investigators are quick to uncover a web of affairs, lies and fraud that lead them to her killer.

Kelly and Johnny Bonds uncover new details in the tragic 27-year-old unsolved murder of Kathy Page, a case that shocked a small town and inspired the award winning film "Three Billboards Outside Ebbing, Missouri.".

Kelly and Abbey investigate the 2006 homicide of Candace Hiltz, a teenage mother shot just feet away from her infant daughter.

Kelly and Steve try to solve the murder of a woman who was brutally stabbed and then lit on fire in an attempt conceal the crime; a neighbor's report of a mysterious black truck could lead investigators to her killer.

Kelly and Steve team up with the Clinton County Sheriff's Office to solve the heartbreaking cold case of a young mother who vanished, leaving only her wedding rings behind; did she walk away, or was she murdered?

Kelly and Abbey investigate the 1999 murder of a beloved churchgoing mother and grandmother, shot dead in her own home; with no known enemies, was she killed to send a cruel message to someone she loved?

In 2012, a tight-knit Las Vegas neighborhood is shattered by the murder of a mother and daughter in their home; investigators must analyze a crime scene soaked in rage to help stop a killer before they strike again.

The "Cold Justice" team investigates the mysterious death of a pregnant mother whose skull was found on a wooded mountain; with multiple suspects and conflicting stories, can they uncover the truth and get justice for her and her unborn child?

Kelly and Abbey investigate the 1999 murder of a beloved churchgoing mother and grandmother, shot dead in her own home; with no known enemies, was she killed to send a cruel message to someone she loved?

In 2012, a tight-knit Las Vegas neighborhood is shattered by the murder of a mother and daughter in their home; investigators must analyze a crime scene soaked in rage to help stop a killer before they strike again.

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.

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.

The missing-persons case of 12-year-old Jonelle Matthews in Colorado remains a mystery for more than three decades until detectives narrow in on a suspect whose bizarre behavior after her disappearance hints at something much more sinister.

The missing-persons case of 12-year-old Jonelle Matthews in Colorado remains a mystery for more than three decades until detectives narrow in on a suspect whose bizarre behavior after her disappearance hints at something much more sinister.

A father in Hawaii tackles setback after setback in his fight for justice for his murdered daughter.

The friends of a father from Georgia accused of murdering his ex-wife come together to prove he is innocent, while prosecutors count on his young children to testify against him.

A teenager is convicted of encouraging her boyfriend to kill himself; exclusive interviews with those on both sides of the case.

When a devout single mother vanishes from her home, investigators fear she's been abducted by a group of teens hell-bent on a devilish plan; they race to find her before it's too late.

When a man goes missing in a rural small town in Tennessee, family members and detectives band together to uncover scandalous secrets fueled by greed and lust.

After a beloved father vanishes, his family and the police work tirelessly for four years to find him; a familiar witness comes forward and leads detectives to finally expose a diabolical conspiracy which may have been paid for by sexual favors.

When the body of a newlywed is spotted at the base of a cliff in Glacier National Park, local and federal authorities join forces for an investigation that will put their skills to the ultimate test.

After a well-known saddle maker passes away from an apparent heart attack, police find reason to question the natural death after rumors about drugs and embezzlement come to light.

When a beloved grandfather is found shot dead in his Florida home, detectives fear his missing ex-wife is also in danger; as they uncover a tangled web of romance, infidelity and betrayal, new questions arise about her involvement in the murder.

A father of four vanishes days before Christmas; what authorities believe to be a bond violation, unfolds into something evil.

Numerous patients at a Texas dialysis treatment center have gone into cardiac arrest, resulting in five deaths in one month; investigators work with the Centers for Disease Control to expose a chilling connection between the unexplained tragedies.

A seaside home becomes the scene of a gruesome double homicide when a couple is found dead during a welfare check. After shocking video evidence surfaces, investigators race to identify the killer and uncover a ruthless murder plot fueled by revenge.

An Iowa man is fatally shot, and his girlfriend claims self-defense; as their turbulent relationship is examined, her social media reveals a troubling pattern and sinister motive.

A respected soldier and beloved family man is found shot to death inside his home; investigators uncover a salacious love triangle and expose a murder-for-hire plot fueled by manipulation and greed.

Kelly and Abbey investigate the 1999 murder of a beloved churchgoing mother and grandmother, shot dead in her own home; with no known enemies, was she killed to send a cruel message to someone she loved?

In 2012, a tight-knit Las Vegas neighborhood is shattered by the murder of a mother and daughter in their home; investigators must analyze a crime scene soaked in rage to help stop a killer before they strike again.

A respected soldier and beloved family man is found shot to death inside his home; investigators uncover a salacious love triangle and expose a murder-for-hire plot fueled by manipulation and greed.

After a father is found dead in his family's Florida mansion, what at first appears to be suicide turns into a complex murder mystery where a mother's cryptic words and a son's suspicious behavior suggest either could be hiding a deadly grudge.

When a woman survives an alleged assault in the New Mexico desert and her purported attacker is found stabbed to death, investigators must get to the bottom of a bizarre murder plot driven by one suspect's obsession with the occult.

After a 911 hang-up, Pasco, Wash., police report to the caller's address and discover a beloved grandmother has been fatally shot; detectives will combat self-defense claims as evidence of a greedy scheme comes to light.

An aspiring young artist from Virginia is reported missing by his family. When his body is found weeks later, investigators must delve into his tumultuous family life and uncover an eyewitness who reveals the lies and deceit that led to his murder.

A man's body is discovered in his Texas home, hidden for weeks after his murder; when police discover that his family is missing as well, the investigation reveals a desperate escape attempt and a motive rooted in fear and betrayal.

A group of women help bring down a smooth talking serial predator turned killer who lured young women with promises of fame and fortune.

A group of women help bring down a smooth talking serial predator turned killer who lured young women with promises of fame and fortune.

Years after the kidnapping of Amanda Lindhout, secret agents put a daring undercover sting into action.

A victim's burning body is discovered one night in February and investigators are put on the trail of an elusive criminal whose desire for financial gain leads to murder.

When a household is targeted by gunfire twice in a short amount of time, investigators in rural Missouri sift through a community in search of a family's enemies, which leads them to a mastermind pulling strings.

An investigation into the mysterious death of a loving mother leads authorities to uncover a diabolical plot hatched close to home.

After an endearing World War II veteran and family man is laid to rest from apparent natural causes, a surprise witness surfaces with murder accusations, sparking a police investigation into a devious predator.

When a body is discovered in the trunk of a burning car, police in Ohio sift through the ashes for clues; as the years slip by without an arrest, the killer may have evaded capture.

The discovery of a body in a wildlife management area launches a murder investigation that forces a group of friends into the hot seat; when police think they find a surprising clue and possible hidden message the case breaks wide open.

An investigation into the murder of a military hero tests the bonds of military camaraderie and unravels a myriad of secrets, lies and hidden identities.

A woman's innocence is called into question after her husband dies from a mysterious malady and encourages detectives to take a deep dive into her past.

When a man is ambushed by a firestorm of bullets outside his home, investigators follow a twisted trail of suspects to a vindictive mastermind.

A secret affair between a woman and her church's pastor becomes public when they become suspects in a murder.

A college romance goes cold and ends with a murder that takes 22 years to solve.

A wife starts a New Year by ending her cheating husband's life.

A biology professor ends a faculty meeting with gunfire and reveals a surprising history of violence.

A respected soldier and beloved family man is found shot to death inside his home; investigators uncover a salacious love triangle and expose a murder-for-hire plot fueled by manipulation and greed.

Two teen girls are brutally murdered and one of their best friends could be responsible.

A wife claims an intruder killed her husband, but the real mystery turns out to be the couple's secret lives.

A woman confesses to her husband's unsolved murder.

A woman complains about her ex-husband, but her venting has deadly consequences.

An old flame comes back to rekindle a romance and ends up charged with murder and arson.

In 2012, a tight-knit Las Vegas neighborhood is shattered by the murder of a mother and daughter in their home; investigators must analyze a crime scene soaked in rage to help stop a killer before they strike again.

Kelly and Abbey investigate the 1999 murder of a beloved churchgoing mother and grandmother, shot dead in her own home; with no known enemies, was she killed to send a cruel message to someone she loved?

Former DEA agent Andrew Hogan details his search for Mexican drug lord Joaquín "El Chapo" Guzmán with never-before-seen videos and photographs.

When a young woman finds out that her boyfriend might have shot and killed a college football player out of revenge, she struggles with coming forward to officials, fearing she could lose her life.

Rapper Meek Mill interview; exploring controversies surrounding the criminal justice system, including the parole system, wrongful convictions, challenges faced by law enforcement, alleged police abuse and more.

After a young woman vanishes from her neighborhood, North Carolina detectives are snared in a tangled web of deceit as they uncover a vicious love triangle; it's a race against time to find a killer and the evidence they need to solve a dark mystery.

When a young mother in Newport, Maine, goes missing, the case goes cold until another mom suddenly vanishes, sparking an investigation that leads to a deadly game of cat and mouse and grisly discoveries in a rustic backyard.

A Milwaukee contractor is shocked when he discovers a body in a shallow backyard grave; the ghastly remains send investigators chasing an atrocious truth and have a community running scared from their own neighbors.

A man goes missing from an idyllic Idaho town, leaving detectives puzzled and a daughter driven to find her father; as the investigation unravels, a truth is revealed that is stranger than fiction and a killer no one ever sees coming.

When a man and his dog make a disturbing discovery in a backyard beach, a series of horrifying events unfold in a sleepy South Carolina town; investigators fear no one is safe as they desperately track a killer potentially hiding in plain sight.

When a long held secret in Florida threatens to expose a deadly truth, investigators work to unravel a baffling mystery; the dark life of a beloved mother may have put her in danger; a husband's desperate pleas may be the key to solving the case.

A young woman is found with a fatal head wound and her hand on a shotgun; her fiancé claims she killed herself, but grieving family members insist the suicide scene was staged; the case goes cold until a new prosecutor takes a second look.

A beloved grandmother is found with a red bathrobe sash knotted around her neck; her death appears to be a suicide until the medical examiner rules homicide; the victim's husband is charged with murder, but the case takes a surprising turn.

A car crash on a rural highway leaves one woman dead while her husband walks away unscathed; it appears to be a tragic accident, but one state trooper can't shake the feeling the crash is anything but routine.

Firefighters discover the charred remains of a young wife and mother, but the flames didn't kill her; she sustained a gunshot wound to the head, and the evidence points to her taking her own life; loved ones argue it's a case of murder.

A police officer discovers his young wife with a fatal gunshot wound from his service weapon and her death is ruled a suicide; investigators uncover a shocking story.

A husband discovers his wife face down in their bathtub; her death appears to be an accident, but questions are raised about how she drowned.

The killer removed the computer that links him to the murder of a woman and her soon-to-be ex-husband that he had met online.

A community is shocked when police discover a woman raped and murdered in broad daylight on a public trail.

A real estate developer is shot and his wife becomes the prime suspect, until the bullet is linked to a weapon reported missing 20 years ago.

A body is found stuffed into a suitcase forcing the police to search though the landfill for another missing victim.