A young mom, married to her high school sweetheart, vanishes; did she leave her family to start a new life or was there another reason for her disappearance; decades later her grown son faces a dark truth at the core of this mystery.

It was a mystery that stumped investigators for years; a college student disappears after a night out clubbing; her mother thought she was at a sleepover with friends and it takes an eagle-eyed detective to find the truth buried in a pile of lies.

When the half-dressed, partially frozen body of a Navy veteran is found lying in a ditch, rumors and lies will challenge detectives' efforts to lay bare the truth behind the chilling death.

When a successful Texas lawyer and his wife are executed while sleeping in their bed, Houston police team up with a private investigator, who gets dangerously close to a killer, to uncover a greedy mastermind who proves that privilege can be deadly.

A man who was recently acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story; interview with the victim's mother and key players in the case.

A man who was recently acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story; interview with the victim's mother and key players in the case.

In Mustang, Okla., firefighter Keith Bryan reconciles with his wife, then he is shot in his own home and dies a few hours later at a nearby hospital.

A man snaps after a childhood trauma is triggered.

A killer targets law enforcement personnel.

Houston police search for a serial killer preying on young women until a local man's DNA finally reveals the culprit; upon his arrest, the killer's sister and daughter learn his true identity.

The ex-girlfriend of the self-proclaimed Crossbow Cannibal reveals the mental and physical abuse she endured for years at the hands of one of the U.K.'s most heinous serial killers.

The youngest son of a church-going family man finally learns the truth about his father when the man's second wife is found dead in their hot tub, and police look back at the suspicious drowning death of his first wife.

Officers must determine if there is more than one killer at the same time when dozens of women are murdered around the city of Baton Rouge, La.

A killer is behind bars after DNA connects him to seven victims in Baton Rouge, La., but the murders don't stop after his arrest; new fear sweeps the city and law enforcement must act quickly to find a second, and maybe even a third, serial killer.

Exploring the reign of the Southside Slayer and the truth; the Southside Slayer wasn't one man, but four separate serial killers operating at the same time in the same place.

The truth behind the brutal deaths of a prominent and wealthy couple in Libertyville, Ill., remains dormant until 15 years later when a new police task force exposes a murderer who let money remove the sense of consequence.

The mysterious disappearance of an elderly New York socialite leads to the investigation of Sante Kimes and her son, Kenny.

An investigation into the murder of a New York businessman zeroes in on a family member whose plush lifestyle launches a tabloid frenzy; a closer look reveals the suspect's inner demons calling the greedy motive into question.

The American dream of a hard-working immigrant is cut short when he is violently murdered with a hatchet in the streets of a Las Vegas suburb; investigators sift through lies and follow a bloody trail to uncover the shocking truth.

Kelly and Steve investigate the brutal homicide of a beloved seminary student who was brutally hung and stabbed to death in the chapel restroom; their investigation reveals even more dark secrets and sinister deeds.

The team tackles the twisted murder case of Rhonda Richardson, who went searching for her lost dog and was later found seemingly scalped by a sadistic killer; the biggest twist is a new piece of evidence that breaks the case wide open.

Federal agents descend on a tiny Ohio town after a beloved girl goes missing; fearing their cornfields harbor a terrible truth, theories abound and panic spikes in this serene community; it's a race against time as investigators close in on a killer.

Investigators in York, Penn., enter a dark world of buried secrets after a couple makes a stunning discovery in their backyard; a brother appears desperate to find his sister, but in a strange twist could lead detectives to a staggering truth.

Abraham Shakespeare goes from rags to riches when he wins a big Florida lotto jackpot; then he disappears, and police must determine if he was escaping the greed of friends and family, or if his newfound fortune made him a target for foul play.

A son becomes the prime suspect when he reports finding his mother stabbed to death in their home in a gated community in Davie, Fla.; detectives must determine if seemingly obvious clues really point to him - or in another direction.

When a University of Florida student vanishes, police can't ignore the possibility that he disappeared into the alligator-infested swamps around Gainesville; but they discover he may have fallen prey to a deadly danger closer to home.

Investigation into a deadly house fire.

Investigation into a deadly house fire.

Conflicting physical evidence confounds detectives after beauty queen Nona Dirksmeyer is found beaten to death in her Arkansas home.

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.

Jodi Arias is convicted of murdering her ex-boyfriend, Travis Alexander.

A former ladies' man has a change of heart when he falls for a pious day care worker, but when his body is found floating in a creek, detectives discover there's more to their relationship than meets the eye.

An investigation into the disappearance of a devoted father leads Arkansas police to a shocking crime scene, the search for answers reveals gang threats, and a killer that's willing to go to great lengths to escape justice.

When a California mother wakes to find the door wide open and her daughter missing, law enforcement travel the country to find her until they discover a dark plot that began at the teen's doorstep.

A spunky grandmother and former bail bondswoman is a no-show at work, leaving friends and family desperate for answers. As investigators focus on felons from her former career, they soon discover she may not be the only one missing.

A young couple sets out from a holiday visit but never makes it home as law enforcement search dangerous terrain fraught with derelict silver mines.

When a successful Arizona businesswoman disappears on a holiday shopping trip, investigators hunt for a kidnapper; when the killer takes his secrets to the grave, however, the only chance of finding her is a psychic's mysterious vision.

When a Michigan mother disappears on an afternoon walk, investigators pin all hope on their sole eyewitness: a 10-year-old boy who may have witnessed the unthinkable.

A beloved Missouri couple is thought to be swept away in a record-breaking deadly storm, but when a closer look at the family farm points to foul play, law enforcement searches for clues long since washed away.

Police believe the discovery of a body in a Florida backyard ends the desperate search for a missing woman, but it only deepens the mystery.

When a popular librarian vanishes after a night of dancing in Kentucky's capital city, the investigation focuses on family secrets, but police must unravel a different kind of secret to get to the truth buried in one of the city's parks.

An idyllic North Carolina town makes the international press when a double murder involves a victim with an infamous past.

When a young Texas mother goes missing, a tangle of dark secrets and a trail of deceit threatens to derail the investigation.

A case of identity theft in the Arizona desert takes a blood curdling turn when investigators make a ghastly discovery in the most unlikely of places; a beloved man may have been living in fear.

The deadly beating of a young man in West Liberty, Iowa, sits unsolved for 25 years, until cold case detectives are approached by an unexpected witness.

Sleepy Seadrift, Texas, is unnerved by the death of a local landscaper after evidence at the scene of an apparent hit-and-run points to a deceptive killer with a dangerous past.

When a young Texas mother goes missing, a tangle of dark secrets and a trail of deceit threatens to derail the investigation.

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.

When a Florida teen tending to some yard work digs up a frightening scene, investigators find themselves in the middle of a twisted affair; a wild trail of evidence leads them across three state lines and the discovery of an astounding truth.

Investigators seek answers when a prosecutor and a district attorney and his wife are murdered within a couple of months of each other.

Investigators seek answers when a prosecutor and a district attorney and his wife are murdered within a couple of months of each other.

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.

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.

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

When a beautiful garden turns into a dark abyss, the serenity in Salem, Oregon is shattered; all is not as it seems as investigators dig into the life of a single mom; as the grisly details begin to unfold, the chase is on to catch a killer.

A bizarre trail from South Dakota to Minnesota ends in a dark discovery and a case gone cold; while investigators question whether a man of God is the key to solving this mystery, they fear blind faith is not only risky, but could prove to be deadly.

Small town McNeil, Ark., is grief-stricken after a retired sheriff is suddenly shot to death; when the case appears to be closed, a killer strikes again, and another local hero is struck down.

A family man is gunned down on the side of the road in a small town in Texas, and detectives unearth a perpetrator who's hiding more than one shocking skeleton in the closet.

After a hardworking mother is trapped and killed in a California house fire, investigators sift through multiple theories to figure out who could have ignited the deadly blaze.

As Pennsylvania police investigate the gruesome murder of a grandmother in her own home, detectives sort through a web of lies and nefarious activities before ultimately going toe to toe with a cold-blooded killer.

When an airman from Lee, Maine vanishes only four months into his marriage to a country girl from West Texas, it triggers a multi-agency investigation that exposes a darker side to southern hospitality.

After a bizarre account of suspected false identity is reported, authorities uncover a long history of an evasive criminal and launch a nationwide hunt to catch a killer who uses Southern charm as a weapon of deception.

The peaceful life of a retired North Carolina couple is shattered when a husband's body is found in his own garage, leaving investigators to sort out fact from fiction with the help of his wife.

When a small-town preacher is hospitalized with a mysterious illness, North Carolina police uncover a string of suspicious deaths centered around a Burlington woman who has a hidden dark side.

A Virginia father is reported missing two years after he was last seen; as the investigation ensues to track down his last location, a disturbing discovery will expose two mysterious deaths tied to a greedy scheme.

When a young Texas mother goes missing, a tangle of dark secrets and a trail of deceit threatens to derail the investigation.

A deadly mystery with deep running roots snakes through a small Alabama town, shattering a young family and baffling the community; investigators unlock long held Southern secrets to solve a murder and discover a truth steeped in blood and revenge.

A Virginia father is reported missing two years after he was last seen; as the investigation ensues to track down his last location, a disturbing discovery will expose two mysterious deaths tied to a greedy scheme.

When a prominent insurance salesman is gunned down on a country road in Kinston, North Carolina, a 20-year-old secret comes to light and casts a shadow on a killer's flawless reputation.

After a young California father is ambushed on the steps of his own home, Santa Clara detectives uncover a complex murder plot that ultimately leads them to an unexpected mastermind who's been hiding in plain sight all along.

After a wrathful killer strikes a small Alaskan village, investigators must untangle a truly twisted romance to find out what led to this rage-filled stabbing.

Kelly and Steve Spingola head to Wisconsin to investigate a homicide; the case becomes personal after they receive a letter from the victim's daughters; their search uncovers a town's dark side, crimes against children and lies within a church.

Kelly and Tonya Rider investigate the strange death of a retired college professor in Tonya's home town, whose cremation was halted by an anonymous tip call hinting at murder; an autopsy proves the tipster's information is accurate.

During a weekend away, a longtime married couple go on an afternoon hike that ends in tragedy; a multitude of evidence makes the mystery hard to untangle.

During a weekend away, a longtime married couple go on an afternoon hike that ends in tragedy; a multitude of evidence makes the mystery hard to untangle.

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.

Police search every apartment building in town when the body of a young girl found on an isolated farm holds a set of keys but no ID.

A man denies killing a pedestrian in hit-and-run, claiming he sold the car in question, and authorities track down the car to find critical evidence.

An unsuspecting field worker makes a horrifying discovery in a backyard orchard and detectives chase down deadly clues; when a savage killer slips through the cracks, innocent lives are threatened and solving this case is suddenly in jeopardy.

In the emerald suburb of Cordova, Tenn, the Caronna's live a seemingly perfect life; when one of them turns up missing on the day of a big party, investigators uncover that behind closed doors lies a mysterious tale of lust and greed.

A look at the shooting of a star polo player at the hands of his heiress girlfriend in a tight-knit Virginia community; detectives must determine if the heiress acted in self-defense as she claims or if there's more to the story.

In Deltona, Fla., a limo driver disappears amid rumors that he's hiding from gambling debts; detectives are forced to search for body parts all over central Florida as they investigate a suspect's horrifying story about why the man vanished.

In tiny Beulah, Florida, security video from the home of a couple known for taking in special needs children contains clues investigators must decipher to learn who targeted the parents for murder and executed them in front of their eight kids.

After a devoted father is found murdered in his home, Indiana investigators learn just how manipulative and deadly a person's envy can be.

When Jaclyn Martin's life of comfort is jeopardized, she orchestrates the killing of her husband, a beloved neighborhood bar owner.

An investigation quickly turns cold in rural Tennessee when the body of a small-town farmer and businessman is found near a trash pile; the case is reopened 25 years later, hoping advances in technology will finally help close this cold case.

After a father's life is tragically cut short in a car accident, the events that follow force Ohio investigators to race against the clock to prevent a murder-for-hire plot before it's too late.

The case of a beloved Kenosha social worker's murder resurfaces nearly a decade after leads run dry when an odd call from another state reveals the gruesome truth about a vengeful pack of killers.

When a beloved plastic surgeon and his office manager are gunned down at work, detectives chase down several leads until they uncover one suspect hiding malicious intent.

When a family dispute turns violent and results in the death of an Oregon man, detectives must sort through a cast of characters to uncover the leading lady at the center of the crime.

The search for a missing boater on Lake Coeur d'Alene turns sinister after a local newspaper uncovers a shocking story, forcing residents of the peaceful lake town to question their neighbors.

A haunting text message leaves the family of a missing young man desperate for answers; as Chicago detectives work through multiple theories, they eventually unearth the shocking truth to his sudden disappearance.

After an Air Force pilot is found shot to death in his Ohio home, authorities embark on an international manhunt that spans over a decade to bring the fugitive to justice.

Just as detectives investigating the death of an Atlanta based rapper are closing what appears to be a domestic dispute case, they are faced with horrifying evidence planted by the victim seconds before his death.

The murder of an Arabi, La., man forces authorities to examine every possible lead as they eventually learn their prime suspect is closely tied to an open cold case in Indiana.

When a young woman is found mysteriously gunned down off a remote highway, Michigan detectives look into the victim's past for answers, uncovering a scandalous web of infidelity and betrayal.

When a man is found shot dead on a roadside in rural Ohio, it looks like a hunting accident; more outdoorsmen are found gunned down in neighboring counties; someone is hunting the hunters.

In rural Michigan, a young woman is found drowned in a lake, her baby missing; however, they're not the only locals who've recently vanished only to turn up dead; one elusive man is at the center of it all.

A couple's romance on Nantucket Island turns tragic.

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.

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.

Three years later, a second autopsy determines who's right when a medical examiner and detectives disagree on the cause of death.

Hit-and-run boating accident that kills a popular young man causes investigators to search for one boat out of thousands.

The gruesome discovery of a decomposed and dismembered corpse buried in the backyard of a Seattle home results in an investigation that unravels a 30-year-old murder plot hatched by a scheming, vindictive family.

After the body of a missing young mother is discovered in a shallow grave behind her own home, cops must investigate the complicated relationships of her past and present in order to identify a motive and track down her killer.

After a homeowner discovers a mummified corpse buried inside a barrel beneath his home, detectives must painstakingly piece together a series of hidden clues to locate a killer who thought they had committed the perfect murder.

A man is found dead in the shower, and police have only two suspects, but to figure out who killed him and why, is not as cut and dry as it may seem.

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.

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.

In the summer of 1991, a pair of half-siblings creates panic across southern California when they embark on a spree of random crimes of the worst kind, targeting people out doing everyday tasks.

After a man is found brutally murdered inside his own bar, a murder mystery unfolds over the span of years; detectives believe it's a business deal gone bad and must remain steadfastly dedicated to the case after hitting several dead ends.

The Carr brothers arrive in Wichita, Kan., intending to commit robberies, but their plans quickly escalate to a murderous spree the likes of which Kansas had never seen; their reign of terror becomes known as the "Wichita Massacre.".

Newly single Michele Davis is killed when her car careens off an Iowa highway; what looks like an accident is anything but, however, as investigators peel back the layers of her life and discover a motive for murder.

The sudden disappearance of Manjit Panghali sparks a massive search for the pregnant mother; investigators uncover a tight-knit immigrant community in shock, a family in mourning and a killer relationship exposed.

The brutal murder of a woman inside her Kentucky home triggers an investigation that reveals an underage romance fueled by obsession and rage.

When a loving couple are murdered in their home, the investigation uncovers a forbidden romance between two young lovers willing to do anything to get what they desire.

A bag full of evidence recovered from an iced-over river helps to reveal the murderer of a businesswoman in her own shop.

Eyewitness to real estate agent's murder is put under forensic hypnosis in an attempt to help him recall the killer's face.

Police launch a search for a killer after a teenager returns home to find his father's body in a pool of blood.

Pathologist examining the death of a politician who was running for re-election finds tiny puncture wounds at the autopsy.

A Naval officer who threatened to go public with tales of on-the-job sexual harassment and assault is brutally murdered, but when investigators find the allegations could be part of an elaborate scheme for money, they turn to forensic science.

A man is found stabbed to death after a night in a strip club. A drop of blood on a bedspread becomes critical evidence five yeas later.

After police identify a murder victim thanks to her butterfly necklace, they discover several co-workers had vendettas against the victim.

The brutal murder of a construction site foreman looks like the work of a disgruntled employee, but forensic science points to an unlikely suspect.

A shooting victim mutters the name of her apparent assailant before dying, but fingerprint comparisons, handwriting analysis, ballistics and DNA testing show someone else close to home is the true killer.

A woman tells investigators that a man broke into her home wearing only underwear and gloves, killed her boyfriend, and raped and terrorized her.

Two-and-a-half decades ago, a man from Milwaukee named Jeffrey Dahmer was tried and convicted of 17 gruesome murders that occurred between 1978 and 1991. Dahmer was convicted of luring young men into his home, where he then drugged, sexually violated, killed and finally consumed them. Investigative journalist Nancy Glass secured exclusive access and the first televised interview with the famous serial killer. "`Dahmer on Dahmer: A Serial Killer Speaks' catapults viewers into Jeffrey Dahmer's psyche, providing a unique look at the life of a serial killer that shook the nation," says Oxygen Media programming executive Rod Aissa.

A similar abduction in New Mexico helps crack the case of a 19-year-old missing college student in Oregon.

A similar abduction in New Mexico helps crack the case of a 19-year-old missing college student in Oregon.

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

A woman is found dead on her bedroom floor, the only clue is a bloodstained sheet; breakthrough forensics enable police to identify the killer.

A young man was killed in a mysterious car crash, but the evidence at the scene led investigators to believe it was not an accident; forensic science revealed what really happened, and the truth devastated three families.

When the body of a beloved, elderly woman is found brutally murdered and stuffed inside a decorative wishing well in the backyard of her property, a dogged detective goes on a years-long hunt to catch her elusive killer.

A paroled killer linked to the disappearance of young women forces police into a desperate manhunt; this shocking case unfolds against a backdrop of unfortunate legal and parole decisions that set Kenneth McDuff loose to become a serial killer.

After a police chase ends in tragedy, Special Prosecutor Kelly Siegler returns to her rural roots to seek justice for a murdered game warden and his devastated family.

Kelly and Johnny Bonds return to their home state of Texas to look into the disappearance of a young mother in 2000, whose family has never given up on her; while some suspect murder, others claim to have seen her on the run with a mystery man.

Kelly and Johnny Bonds answer the call of a grieving mother, whose 19-year-old son drowned while camping with friends; despite the medical examiner ruling it an accident, some suspect foul play.

Kelly and Abbey Abbondandolo investigate the cold-blooded murder of a fun-loving Texas country boy shot in the back of his head; it could the result of a love triangle gone tragically wrong.

When Karen Pannell is found stabbed to death, a message scrawled in blood seems like a beacon that could lead detectives to her killer; it takes a dogged forensic specialist with a keen eye to unravel the mystery.

Larry McNabney has a thriving career and a wife he adores, but then vanishes; at the center of the twisted mystery, three lives tangle together in a love triangle, including one who hides a secret identity.

Jack Jessee was a family man who didn't seem to have an enemy in the world, up until the night he was killed; the case goes cold but a relentless detective is determined to catch Jack's killer.

Steven B. Williams, a DJ with a golden voice, vanishes in a mystery that stretches from California to Montana; the clue to it all is wrapped in a napkin, tucked in a cabinet and hidden in a library.

Judy Carlson lived in a painful limbo; her son disappeared without a trace; years went by and she may never have known his fate if not for a rookie detective's dogged work, but to solve this cold case, the investigator also need the help of a killer.

The neighbors enjoy mixing business with pleasure then a murder makes them face the reality that a killer is in their midst.

Michelle Young was married to her college sweetheart and pregnant with their second child when she was murdered; in the search for her killer, detectives uncovered a marriage riddled with secrets but cracking this complicated case took years.

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.

A case Keith Morrison can't forget in which a teen's murder shakes a Nevada community and two unlikely people confess.

Andrea Canning recalls a case in which investigators set up an elaborate sting operation to stop a murder-for-hire plot.

Investigators believe a young woman left of her own accord, but her mother is convinced that someone close to her is hiding a big secret; a two-year search for the truth brings investigators to the backyard of a historic location.

While attempting to identify the remains of a victim found buried in the backyard of a plush California home, investigators learn another murder was committed at the exact same residence 30 years earlier.

When Tina Sandoval disappears, her parents and loved ones spend years searching for her; a secret she was keeping may lead to clues about what happened to her.

When Tina Sandoval disappears, her parents and loved ones spend years searching for her; a secret she was keeping may lead to clues about what happened to her.

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

A woman is found dead, police use blood evidence and computer forensics to convince a jury that the murderer is guilty.

When an elderly woman dies in an apparent robbery-homicide, evidence suggests the suspect broke out of the house rather than breaking in.

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.

A young mother's passionate affair with an old boyfriend ignites suspicion when someone close to both of them is murdered.

When a young military wife goes missing from a Marine base, investigators suspect a forbidden love affair and a secret pregnancy may have driven someone to murder.

The investigation of a young gamer's murder begins with his mother's heartbreaking 911 call but when detectives find a clue inside evidence left at the crime scene, the case turns into a multi-state search for a heartbroken suspect.

After a psychic dream leads detectives in Florida to the body of a missing nurse, the ensuing investigation uncovers a series of brutal betrayals exposing a vengeful killer fueled by jealousy.

When a firebomb attack destroys the home of two sisters, police turn to the neighborhood for answers, but the high-profile case takes an odd turn once detectives realize they have a homicide on their hands and the culprit is much closer to home.

Investigators work to uncover the truth behind a local church scandal in order to pin down a most unlikely suspect after a young Texas teacher is found axed to death on Friday the 13th.

When a beloved woman in North Carolina is found stabbed to death in her own home, investigators uncover an unnerving history of harassment carried out by a killer blinded by jealousy.

When a police officer's wife is shot to death in her bed, her parents' certainty that investigators have it wrong and their determination to untangle the mystery, makes the case unforgettable for Josh Mankiewicz.

A man charged with murder denies committing it; the courtroom strategy provides a twist.

Keith Morrison reflects on the case of a Chicago woman from a big family who went missing.

Andrea Canning recalls the case of a popular kindergarten teacher who goes missing after shedding hundreds of pounds, and investigators find a link between her weight loss and her disappearance.

When a pharmacist is found shot dead, investigators go on a 15-year hunt for his killer; for Andrea Canning, this story has unique locations, fascinating potential suspects and riveting plot twists, but says the victim makes this mystery special.

Josh Mankiewicz recalls the story of a detective who makes it her mission to find dozens of women who vanished on the streets of Albuquerque, N.M.

A wife calls 911 to report her husband has been shot on a country road in Texas; what she tells investigators next makes this case memorable for Josh Mankiewicz.

After a night out in New York City with his new girlfriend, 56-year-old businessman Charles Butler simply vanishes, and his panicked children only receive confounding texts in response to their inquiries.

Investigators discover that moments after teenage social media star Alexis Murphy posts her final tweet before vanishing, she is captured on surveillance footage at a local gas station.

When a woman is abducted during her evening shift at a gift shop, her family keeps the case in the public eye for decades, until investigators finally solve the mystery.

When a woman is abducted during her evening shift at a gift shop, her family keeps the case in the public eye for decades, until investigators finally solve the mystery.

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

Wealthy man is shot dead while his wife is forced to open their hidden safe, but they couldn't be identified because they were wearing ski masks.

The bomb was constructed to cause as much damage as possible and it did, killing the victim with deadly force and flame; a painstaking search yielded tiny clues, which identified the killer as surely as if he'd signed them.

When a young Texas mother goes missing, a tangle of dark secrets and a trail of deceit threatens to derail the investigation.

Eight family members are executed in one night as detectives must unearth the hidden motive to track down the killers; while the community mourns, investigators analyze bloody footprints to determine which path leads to the truth.

As investigators zero in on the Wagners, the family starts to feel the heat and begin undercutting each other; a message from Hanna Rhoden reveals a shocking possible motive for the murders.

At George Wagner's trial, stunning testimony exposes secrets throughout the close-knit community; a motive that caused a family of eight to be murdered in four locations in one night is revealed.

Sarah Turney became a viral sensation when she posted suspicions on social media that her dad killed her sister, Alissa; Sarah re-examines her and Alissa's childhood, breaking through years of manipulation to reconstruct the truth.

An affluent family at war with each other for over a decade, find themselves at the center of a murder investigation when a beloved uncle is found dead. Police unravel a conspiracy involving a wayward son and a counterfeit secret agent.

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.

A gruesome Thanksgiving triple murder case lays bare a family's violent past, including a son and daughter each with a score to settle; as the years pass and the case goes unsolved, three families desperately fight for the truth and justice.

The body of a teen is found at a local party spot and theories surrounding her death spread, but the case goes cold for 30 years, until the investigation heats back up.

Authorities are puzzled when a beloved Georgia grandmother is shot execution style, but as the investigation unfolds, a once close-knit family turns against itself.

After leads dry up in a missing person case, detectives in Ennis,Texas, discover a severed body part at a nearby lake; after confirming the DNA match, they begin to uncover the rippling relationship that led to the death of a beloved father.

After the deceased body of a St. Petersburg, Fla., woman is found in an abandoned trailer, investigators search for answers and uncover the dark truth of what happens when someone is pushed too far.

For the first time, Kelly and Steve investigate two missing persons cases at once, a loving mother and her high school friend who vanished just months apart.

Kelly and Steve investigate the biggest unsolved cold case in East Texas - the 1992 death of a popular teen whose charred remains were found in her car.

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 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 husband comes home to find his wife dead next to their outdoor fish pond; her cause of death appears to be from a trip and fall, but when investigators follow a twisted trail of familial deceit and greed, new truths bring her death into question.

When a young mother is found dead at work from an apparent suicide, her church community is shocked by the loss; however, revelations of torrid infidelity and rampant drug use lead investigators on a decade-long search for the truth behind her death.

Lead investigators and family members speak about the murder of Colorado mother Kelsey Berreth, whose disappearance made national headlines after she was last seen grocery shopping on Thanksgiving in 2018.

Lead investigators and family members speak about the murder of Colorado mother Kelsey Berreth, whose disappearance made national headlines after she was last seen grocery shopping on Thanksgiving in 2018.

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.

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.

Robbery seems to be a plausible motive when a North Carolina man is found shot to death in a roadside ditch, but the case remains cold for years until a mysterious letter reveals a more sinister motive than anyone could have imagined.

Authorities are left stunned when stories of mysticism and conspiracy come to the front while they investigate the disturbing murders of an elderly Vietnamese couple in Texas.

A weekend getaway at a Reno resort becomes the center of a mystery when a respected college professor disappears; police learn that the answers may lie buried beneath desert sands hundreds of miles away.

A former judge retires to Florida and becomes the center of a mystery when he vanishes; police must unravel the possible connection between his disappearance and a ghastly discovery found buried at an abandoned golf course.

The discovery of a body buried in a Delaware backyard launches police into an investigation that leads them on a twisted path through bizarre family ties, an unexpected love triangle and an unthinkable murder plot.

A Colorado woman vanishes shortly after moving in with a group of friends; an investigation reveals there was a lot more going on inside the home than anyone realized.

A missing young father in Utah returns home and confesses to an affair, but when he vanishes again a short time later, it quickly seems something more sinister is at play.

When a high school student mysteriously vanishes, police must sort through the whispers, lies and deeply personal secrets of a group of teenagers in a small Michigan town to unearth the deadly truth.

A night out on Hollywood's notorious Sunset Strip leads to a desperate search when a teenage girl doesn't make it home; the search for answers weaves though the strange side of Los Angeles before the tragic truth is uncovered in the Hollywood Hills.

A California mom of three vanishes, and her car is found by the side of a desolate road with a suspicious flat tire; the case goes cold for years until a new detective takes on the case and is determined to get answers.

A cowboy more at ease with horses than people vanishes into the desert after running into a group of California ranchers who believe he's done them wrong.

An entrepreneur forges an unlikely friendship with a ragtag group of skateboarders; but when he vanishes and signs point to foul play, police wonder whether he was really a friend or a target.

When a 21-year-old goes missing during the height of the pandemic, LAPD detectives unravel a mystery hidden in deleted security video to solve a murder.

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.

Wilton Manors, Fla., investigators search for motives after a beloved father is found strangled and battered in his driveway, until an unsuspected confession reveals a complex web of deceit.

After the burned body of a local man is found in rural Missouri, the homicide goes unsolved for nearly two decades until a twisted murder plot is brought to light.

When a 21-year-old goes missing during the height of the pandemic, LAPD detectives unravel a mystery hidden in deleted security video to solve a murder.

A beloved Missouri couple is thought to be swept away in a record-breaking deadly storm, but when a closer look at the family farm points to foul play, law enforcement searches for clues long since washed away.

When a Michigan mother disappears on an afternoon walk, investigators pin all hope on their sole eyewitness: a 10-year-old boy who may have witnessed the unthinkable.

When two women call 911 after hearing someone break into their apartment, their call for help holds the key to solving the mysterious murder of a young graduate student named Katie Sepich.

When two women call 911 after hearing someone break into their apartment, their call for help holds the key to solving the mysterious murder of a young graduate student named Katie Sepich.

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

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

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 successful Arizona businesswoman disappears on a holiday shopping trip, investigators hunt for a kidnapper; when the killer takes his secrets to the grave, however, the only chance of finding her is a psychic's mysterious vision.

A young couple sets out from a holiday visit but never makes it home as law enforcement search dangerous terrain fraught with derelict silver mines.

Investigators in Gresham, Ore., are left with a gruesome crime scene, an assailant on the loose and a missing child after the victim of a stabbing is able to call 911 in a last attempt to save her own life.

When two Ghanian immigrants are discovered murdered in their upscale Maryland home, police are confronted with bizarre evidence that motivates them to take a closer look at the mystifying rituals of voodoo.

The family of a former soldier questions whether or not 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 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.

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.

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.

An argument between a couple ends in murder, but police are unsure if it was an act of self-defense or something more sinister.