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 faced a dark truth at the core of this mystery.

Kathleen Schroll makes a phone call right before her death where she identifies her killer, which leads to an arrest; two trials and 12 years later, authorities begin to wonder who was really the victim.

A smooth convict was offered a deal as tempting as it was dangerous: get key information from a suspected serial killer to win your freedom. The catch? He'd have to go undercover in a psychiatric prison with no guarantee of getting out alive.

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

Madison Holton’s parents had reached their wit’s end. They called a family meeting to confront their rebellious teen. When it was done, two of them were dead and police were left with a puzzling mystery.

When a young woman is found brutally murdered, investigators start to lose hope when they believe that the case is unsolvable, but the victim's mother is determined to get justice and figure out what happened to her daughter.

A chance meeting at a nightclub ends in murder; those involved in the gruesome crime thought they had buried the secrets of the past, but a relentless team of investigators will stop at nothing to unearth the truth.

It was a brutal and baffling crime: a husband shot dead in his own bed. No one else in the house was hurt, not even his wife, who was sleeping beside him. Investigators were suspicious, but there were more surprises in store.

Larry McNabney had a thriving career and a wife he adored. Then he vanished. It was a mystery as twisted as they come. At its center: three lives tangled together in a love triangle, including one of them who was hiding a secret identity.

Financial advisor Pam Zimmerman was everything to her children. Then she was gone, shot dead in her office. Detectives focused on three men in Pam’s life, wondering if the motive was professional or personal.

A woman is found strangled after a powerful storm; police focus on a fiancé and a co-worker with a crush until they hear from a flood of women who've had chilling encounters with a stranger; It seemed a predator was stalking the women of Austin.

It's a mystery with a mind-boggling twist. The deputy warden's wife claimed she was kidnapped by an escaped convict and held captive for more than a decade. But was she really a hostage or a willing accomplice?

She was a dancer who married a dashing photographer. They seemed to have the picture-perfect life -- until the bone-chilling night she disappeared. In a case filled with twists, could the victim help solve her own murder?

Young nursing student Michelle Le had disappeared. Something drew her out to her car. As her loved ones launched a very public effort to find Michelle, investigators began their own methodical search. Was she missing or murdered?

After Johnny Altinger vanished, the trail of clues led investigators to a young director. Detectives worried that the case was a hoax staged by a master storyteller. Turns out, the script was darker than anyone knew.

It was a crime not even police could believe: A toddler was shot in the head and left for dead. Despite the odds, she stunned everyone with her will to survive while a detective vowed to crack this case, no matter how long it took.

Soon after Angie Dodge was murdered, Christopher Tapp admitted he was one of her killers. Police captured his confession on videotape so why would the victim's mom, who once campaigned to put Tapp in prison, now be fighting for his freedom?

Nicole Pietz was a well-liked fitness executive married to the man of her dreams. Then one night, she didn't show up for dinner with her husband and friends. Had Nici's troubled past caught up with her or did someone want to harm her?

When the wealthy heir to a legendary hotel is murdered, the list of possible suspects is long. He had his share of enemies, and a complicated family. Investigators soon learned someone close to the victim was also in danger.

When a woman falls to her death while hiking with her husband in Rocky Mountain National Park, rangers question if her death was an accident or a heinous act of violence.

A family begins a relentless pursuit of justice after the death of Nevada attorney Susan Winters is ruled a suicide; Susan's parents open up about the 7-year case and their efforts to push back against the criminal justice system.

Eleven years after Waterbury, CT mother Donna Palomba is raped in her home while her children slept in 1993, investigators finally track down her attacker. Donna speaks out about the case, including her fight to keep her assailant from walking free.

Twenty-five-year-old Christy Mirack always wanted to be a teacher. She was just getting her start when she was murdered. It took police twenty-five years to find her killer. Turns out, he was hiding in plain sight the whole time.

He was a wealthy doctor with a perfect life and the perfect wife; then, he found her dead on Valentine's Day; she was beloved but did have enemies; investigators followed a bloody trail of evidence, leading to a big courtroom twist.

When a mother of four dies unexpectedly on Valentine's Day, everyone in town assumes she died of natural causes until a detective suspects someone has gotten away with murder.

Beloved by his colleagues, Mark Hasse was a fearless prosecutor. He worked to put criminals behind bars and making enemies was a hazard of the job. He didn’t know it, but a killer was lurking and Mark wasn’t the only target.

A mother of two and a beloved kindergarten teacher finds a new lease on life when she loses hundreds of pounds. Her sudden disappearance causes concern, and police believe her sudden weight loss and disappearance are connected.

Dateline has been covering this twisted tale for more than a decade. Pizza deliveryman Brian Wells robbed a bank with a bomb locked around his neck and, from there, it turned into one of the strangest cases the FBI has ever encountered

A former homecoming queen taking her first steps into adult life is brutally murdered. Who would want to harm her? The investigation centered on two men and a mysterious black bag that seemed to come out of nowhere.

Nick popped the question and Kristy said yes; they were busy planning their future when she found him dead in the bedroom; police questioned spurned lovers and office enemies before a tip from Nick's brother helped reveal the true killer.

Jessie Blodgett was a budding musician and actress; the morning after a performance, Jessie's mother found her dead.

Single mom Sarah Goode went missing after a night out with friends; her family was determined to find her; police turned up four possible suspects and two tantalizing clues; the killer left a signature.

College student Jesse Valencia is found murdered in a residential neighborhood in Columbia, MO; the police search for the truth, and they are stunned to learn that one of their own might be involved.

When a college student vanishes, investigators launch a massive manhunt and quickly discover she is not the kidnapper's first victim; police are inundated with leads before an anonymous tipster divulges a secret that helps crack the case.

For a day that ended so tragically, it started with roses. Nathan and Denise Leuthold had known each other since grade school. Together they built their family on faith, but in a flash, one of them was dead and the other was under suspicion.

A dedicated Air Force Captain who had been deployed overseas for long stretches found himself caught in the crossfire of a love triangle at home. Investigators discovered a tale of obsession and passion. Who pulled the trigger?

A talented, young art student was murdered. The killer left no fingerprints and no DNA. Police zeroed in on three fellow students and, soon, the dark portrait of a killer began to emerge.

A love triangle leads to a murder investigation when a beauty queen, a wife, and a guitarist become entangled in a scandal that causes one Florida man to use a passing hurricane as cover for him to hide from his past mistakes.

When a Chicago woman from a big family goes missing, investigators begin to suspect a man in her life is full of secrets.

One murder in broad daylight. Then another brutal attack almost exactly a year later. Police discovered a chilling connection between the victims, and many feared they had a serial killer on their hands. It was a race to connect the dots.

Michele and Lloyd Neurauter were devoted to their three daughters, even after divorce. When Michele was found dead in her home, police suspected suicide. Then, they uncovered a deadly betrayal too twisted to be true. Except that it was.

When Debbie Hawk vanished, her friends and family were left searching for answers. Investigators discovered that before she went missing, Debbie planned to reveal secrets. Police wondered if silencing her was a motive for murder.

It was Easter Sunday. The Stock family celebrated at home. Hours later, gunshots turned their farmhouse into a house of horrors. There was an arrest but one tiny clue didn't fit. This case was far from being solved.

She was a wealthy, beloved socialite in the suburbs of New York City and an unlikely target for such a brutal murder. Police immediately zeroed in on the most likely suspect but solving this crime wouldn’t be easy or quick.

Susie Casey was an outgoing mother of four going through a divorce. She was twenty steps from her front door when she vanished. Police were investigating three men in her life. The unbelievable thing? They were all there the morning of her murder.

When a handsome veterinarian is found dead in a small Montana town, it launches a mystery that remains unsolved for years. After nearly two decades, investigators think they can solve it, but know convincing a jury will be no easy task.

When Ricky Cowles and his girlfriend moved in together, her best friends moved in too; at first, it was like a big sleep over, then Rickie was found shot dead; his killer would let a secret slip, but turns out, he was keeping more than one.

Michelle Mockbee met her husband at the warehouse where they both worked; it was also where she met an untimely death; security footage led police to a suspect, but when it appeared justice had been served, a scandal turned the case upside down.

Lynne Knight was a vibrant young nurse whose love of adventure made her stand out. Then, she was murdered. The savage crime haunted detectives for decades. The killer thought his secret was safe, until new investigators put fresh eyes on the case.

A quiet night was shattered when intruders terrorized a Florida couple and their young son, killing one of them. Investigators questioned the initial story. Then, a tip led them to another family with dark secrets, and that's when bonds were tested.

When a woman reappeared just two days after her boyfriend reported her abducted, police accused a couple of perpetrating a hoax. When another similar crime takes place, police decide to re-examine the case and find an unlikely suspect.

Celebrity dog trainer Mark Stover and his wife, Linda, built a thriving business and a beautiful home but their dream life didn't last. An affair led to a bitter divorce. Then Mark vanished in a mystery with the makings of a Hollywood thriller.

For investigators, motive can be the hardest thing to find. This crime took place in Florida but detectives didn't discover a motive for murder until they looked into a tropical island thousands of miles away, where a festering grudge was born.

Nikki Whitehead was a single mom working toward a brighter future. She found love, moved into a nice neighborhood and enrolled in college. Then, tragedy struck. Police searched for answers but one thing was certain. This crime was personal.

Hundreds of Americans die every year from accidental carbon monoxide poisoning; according to police in Ohio, one of those deaths was no accident; if anyone knew how to use a deadly gas, it was their prime suspect.

He was a drummer who never missed a beat, then vanished; his family and the police were determined to work together; it was a race against the clock to find him.

When a young, physically fit woman died suddenly, her friends and family were told it was a freak accident in a gym; equipment can malfunction, but so can relationships.

Amber Belken was a young woman with big dreams. Then, she was found murdered. Was Amber the victim of a robbery gone wrong or was this brutal crime personal? Three people knew the truth. Two of them would risk their lives to reveal it.

Angel's Landing was a community of free-spirits with Lou Castro at its center. Investigators were suspicious of the mysterious deaths happening there. Now, commune members have courageously decided to tell their stories in hopes of helping others.

An explosion in a rice field in Colusa County, California kills farm manager Roberto Ayala. But was it an accident or murder?

It's a true Hollywood whodunit. A show business stuntman was shot four times and left to die. Investigators uncovered a love story gone wrong and a villain with a dark secret. But the most stunning twist of all is what didn't happen.

It started with a frightening horror flick from the '80s. Then decades later, it was happening for real. Four people were dead and investigators believed they were chasing a serial killer. Could this old movie hold the key to solving these cases?

It was a custody battle, then baby Savanna was gone. The mystery of her whereabouts spanned two decades. Solving it took investigators nearly 10,000 miles around the world, driven by a determined dad trying to learn what happened to his daughter.

The crime was big news in a small town. Police were swift to key on a suspect. He was a local hero. It was a hunt for justice but was it also the hounding of an innocent man?

A single mother of three vanishes and potential suspects emerge when police discover she may have been living a double life.

Young mom Brigida Uto loved running and chasing her toddler around, and when her health suddenly failed, doctors had to unravel a medical mystery to save her life; then, the FBI joined the confounding case and uncovered a sinister plot.

In a case made for Hollywood, they were camera ready. Erik and Lyle Menendez were convicted of murdering their own parents more than two decades ago. Now hear chilling new details about the gruesome double slaying from the brothers themselves.

Cassy Farrington had two beautiful kids, a doting boyfriend and an exciting new job. Then she was found dead in her bathtub. Cassy's parents were determined to solve the mystery, stopping at nothing until they found justice.

Real estate developer Gary Triano lived large; his murder was a bold statement; there were whispers of a mob connection, an angry investor, or a mad ex, and the mystery took nearly two decades to unravel.

When Bonnie Craig was found dead, police collected DNA but it didn't match anyone in the system. Then, twelve years later, there was a hit but the man was thousands of miles away. Turns out, prosecutors would need more than DNA to convict a killer.

When Karen Pannell was found stabbed to death, a message scrawled in blood seemed like a beacon that could lead detectives to her killer. But what exactly did it mean? It would take a dogged forensic specialist with a keen eye to unravel the mystery.

Brett and Vashti were high school sweethearts now busy raising two boys. Then a fire ripped through their home. In the ashes, investigators found a mystery. What happened that night was no accident.

Private Investigator and former police officer Taylor Wright vanishes, but detectives think there is more to the story after her girlfriend receives strange text messages from Taylor's phone.

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.

Detective identify multiple suspects after a mother disappears, but they later face scrutiny from the woman's family due to the lack of answers they have provided.

Halee Rathgeber enjoyed taking care of others, so it made sense that she hoped to become a nurse. What made no sense was that someone wanted her dead. The crime scene told detectives little, but a jaw-dropping moment in the courtroom spoke volumes.

Jack Jessee was a family man who didn't seem to have an enemy in the world, up until the night he was killed. Was someone carrying a secret grudge? The case went cold but a relentless detective was determined to catch Jack's killer

Steven B. Williams was a DJ with a golden voice. Then he vanished. It was a mystery that stretched from California to Montana, and the clue to it all? It was wrapped in a napkin, tucked in a cabinet, hidden in a library, but would anyone find it?

They were bright young women out for a little fun with their friends. Kenya Monge and Lydia Tillman didn't know each other but they would be forever related, both falling prey to a smooth-talking stranger with a terrifying secret.

A California couple's romantic getaway on a boat turns tragic when the young wife and mother is lost at sea; the case goes cold for years until a model with a checkered past goes undercover to find the truth.

An investigation into the mysterious murder of a businessman exposes a tangled web of evil that extends from the Pacific Northwest into the North Dakota oil patch.

Some who knew the couple in this story saw two people in love. Others saw a marriage in trouble. They loved hunting and were both excellent shots. So good, they rarely missed, whatever the target.

Sabrina admits to killing Lisa, but no one understands why, which complicates the case immensely.

A bank executive tries to rob his own bank. Investigators think it is an inside job but eventually learn the crime is connected to a spree carried out by men who managed to keep their identities secret, praying on people who did the opposite.

Linda Curry had it all: looks, a great job and a brilliant husband. When she got sick, doctors were stumped. Then, she died and police were as puzzled as the doctors, but not her close friends and family. They just needed someone to listen.

For an agonizing four days, the fear was paralyzing. A city was under siege. Six people had been gunned down, but how were the killings linked? A retired detective connected the dots, initiating the manhunt for a man with a gun and a grudge.

Newlywed Dalia Dippolito returned home from the gym to the awful news that her husband had been killed. In a case where almost nothing was as it seemed, investigators wanted to know: Was Dalia diabolical or an unwitting pawn in a hoax gone wrong?

A young father's murder at work leads investigators to deep secrets about sex, friendship, religion and family.

After police discover the burned body of a missing Miami man at the edge of the Florida Everglades, the wife of a local supermarket mogul comes forward to reveal a shocking secret and possible lead.

Detectives in Washington, D.C., discover a puzzling connection between two women who disappeared two decades apart. An investigation reveals a sinister secret hidden along one of the busiest stretches of interstate in the country.

Kelsie Schelling disappears one night after leaving work, leading family and investigators on a four-year hunt to find the pregnant 21-year-old; cell phone records reveal what happened to Kelsie.

When Idaho police retrace the final hours of 16-year-old Cassie Jo Stoddart in 2006, they uncover evidence including a homemade horror film that points to her killers. Keith Morrison reports.

A Blairsville, PA man, 39-year-old dentist and father Dr. John Yelenic, is convinced his messy divorce put a target on his back. When he's found stabbed to death in 2006, his friends and family realize he was right all along in predicting his own gruesome murder.

The investigation into a newlywed's murder starts with a widow and ends with a possible serial killer.

When 19-year-old Anton Black dies while being taken into police custody, the community seeks justice. A yearlong Dateline investigation looks at missed warning signs and the officer at the center of the case.

When Courtney Copeland is shot and killed, his mother investigates whether police detectives did enough to try to solve the case.

Gianni Versace’s longtime partner Antonio D’Amico speaks about the murder of the fashion icon. Versace’s murder came amid a months-long manhunt for Andrew Cunanan, who was accused of committing four other murders throughout the US in 1997.

In a suburb of Toronto, a family lives in fear as one relative after another is found dead over the years in the same house.

Michella and Jenni were from the same town and both loved riding bikes. They did not know each other but were forever connected by their unsolved murders. Someone else their age grew up to become a detective. Now, she was trying to solve their cases.

Investigators didn’t know if Kathy Heckel was a missing person or murder victim. The case grew cold until, decades later, a new detective dusted off the old files. They couldn’t catch the elusive suspect then, but he hoped to solve the mystery now.

Diane Marcell walked into her home and found her daughter covered in blood. Then, she felt pure terror. The attacker said she was next. A single drop of blood was the key to finding him, but it took nearly a decade to unlock its secrets.

Emma Walker was a fun-loving teen with her whole life ahead of her, then she was shot dead in her bed; detectives were facing a tough investigation.

A woman is brutally murdered in her bed and her husband and son both immediately begin pointing fingers at each other after two rapid-fire calls are made to 911.

A college freshman is found brutally beaten, a crime scene so bloody police can't identify the victim, but identifying the killer was easier -- and his motivation for the killing becomes the foundation for his defense.

A forty-year-old man was found dead in his car. Initially, there was no obvious medical explanation for Tom’s death but when police uncovered a love triangle, this tragedy quickly turned into a tangled mystery.

Keith Reed was a highly-regarded school superintendent. When he didn't show up at an out-of-town conference, it set off alarm bells. Investigators took a hard look at his love life for clues and made a startling discovery.

A beautiful, popular graduate student is shot dead outside her apartment in Durham, North Carolina. Who would want her dead, and why?

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.

How well do you really know your neighbors? It's a question at the center of this mystery. The neighbors you're about to meet enjoyed mixing business with pleasure then a murder made them face the reality that a killer was in their midst.

A 40-year-old Minnesota wife and mother, Janet 'Jan' Kruse, is shot to death in her bed while her husband Chris and teenage daughter Bailey are home, leaving investigators to wonder who would want her dead.

On a warm August day, Ray Kotomski quenched his thirst with a cool drink. Kotomski was dead within hours. Investigators had to figure out what killed the happily retired Pennsylvania man, and also whether this was even a crime at all.

Investigators go to unexpected depths to solve the mystery of missing Lynn Friend, a devoted mother who had wedding plans when she vanished.

When young mother and paramedic Annamarie Cochrane Rintala is found dead at the bottom of her basement stairs, it takes four trials and 13 years before justice is served.

What happened in Cara Ryan's bedroom was a mystery. She admitted she shot her ex-husband, but investigators needed to know if it was murder or self-defense. Detectives heard several versions of the story, but for a jury, there was only one truth.

It was just before Halloween. Joel Lovelien and his fiancee headed to a local bar packed with people in costume. Then, Joel stepped outside and walked into a troubling mystery. Police rounded up potential suspects, but could they unmask a killer?

Before the Menendez brothers, the Bobbitts or even O.J., Pamela Smart was television’s first true-crime fascination. Smart’s husband was found murdered and when police began to investigate, they discovered that she was keeping a big secret.

Two years after the disappearance of his wife, Josh Powell kills his two sons and himself. Watch Josh's last in-depth TV interview. Plus, a 911 dispatcher discusses the emergency call placed by a social worker.

A car belonging to a missing man erupts in a blaze, leading to clues regarding his whereabouts.

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 month after Mollie Tibbetts' disappearance in Iowa, investigators discover surveillance video that captured a blurred image of Mollie jogging while being followed by a mysterious black car.

It was a plot straight out of an Alfred Hitchcock film. A woman peers into a neighbor's yard and catches a glimpse of something unsettling. What she saw and what she did set a chain of events in motion that would divide a family and a jury.

It's a gripping case that defies easy answers and Dateline has been following it for more than a decade. At the center, Steven Avery. He and his nephew were convicted of killing Teresa Halbach. Two sides. One truth. Who will you believe?

As detectives struggle to find leads in the murder of a college student, the perpetrator strikes again.

A couple's romantic boat trip turns tragic when a young wife is lost at sea. Did she accidentally drown or was it something more sinister? The case was cold for years until a model with a checkered past goes undercover to find the truth.

It is a story of obsession that boiled over into a brutal crime. Right away, one woman said she knew what happened. Yet, it took years to bring the alleged killer to trial and the verdict was far from the end of this case.

Diane McIver was a successful businesswoman who enjoyed a lavish lifestyle with her husband. Then she was gone. It was a mystery riddled with privilege and power, but investigators needed to answer a crucial question: was this an accident or murder?

This wasn't just any Halloween party. It was the big event of the season. Chelsea had her costume ready, sewed the leaves on herself. She was dressed as Poison Ivy, but never imagined she would encounter real evil that night.

Keith Morrison reports on a dramatic undercover operation in Palm Beach, FL, to save a wife and mother who has no idea she is in danger.

Friends of accused murderer Robert Durst talk about his arrest in New Orleans and his previous whereabouts over 30 years.

It was called the trial of the century and, decades after the polarizing case, questions remain. Hear answers and insights through interviews done over the years, rare footage and revealing conversations with key players who offer new details.

A dancer is murdered in her Virginia home; after interviewing a series of suspects, detectives realize the case is much more complicated than previously thought.

Detectives in Portland, OR, discover a puzzling connection between the 2018 murder of chef Dan Brophy and a blog post written years earlier titled How to Murder Your Husband.

Flight instructor Kelsey Berreth vanishes after she was last seen grocery shopping with her daughter on Thanksgiving in Woodland Park, CO; the case makes national headlines, but the secret behind Kelsey's disappearance is lurking much closer to home.

After the cause of the death of Stacy Feldman in her Denver home is ruled as undetermined, friends and family join forces to piece together what happened. Insiders close to the case speak out about the seven-year battle for justice.

When high school student Megan Nichols vanishes from her Illinois home, her mother finds a note saying that she ran away. A grisly discovery made three years later changes the course of the investigation.

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

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.

Detectives search for answers after Annastasia Hester is stabbed to death in Portland, Oregon.

The security cameras at the home of a wife and mother of three's home may hold the key to solving the mystery of her disappearance.

A beloved kindergarten teacher and mother of two finds a new lease on life after shedding hundreds of pounds; when she suddenly vanishes from her home, investigators uncover a connection between her dramatic weight loss and mysterious disappearance.

When college student MacKenzie Lueck vanished from a park in Salt Lake City, her friends were dedicated to finding answers. The search made national headlines and the investigation revealed a secret that stunned even her closest friends.

Police are perplexed when they find the body of a young woman but are unable identify her; with the help of amateur investigators and new DNA technology, a dogged investigator finds her killer and her identity.

Karen and Mark Duenas had a special marriage. Teenage sweethearts, the couple managed to keep the romance alive even after raising five boys together. Then a perfectly ordinary night ended in murder, a tragedy that would test the bonds of family.

Police probe the shooting of the father and his infant son on the streets of Miami -- while the child survives, the father does not. English

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 young woman was found in the middle of the road, nearly dead. With little evidence to go on, investigators hoped to find out what happened from the victim herself. The problem was, she couldn't remember.

Robert Davis, who was convicted of murdering a woman and her son, claims his confession was coerced and tries to prove he is innocent.

A family mourned the loss of a young mother in a house fire. Authorities ruled it an accident. Then, years later, there was another accident and second loved one was gone. Was this just a string of bad luck or the work of a calculating killer?

A mother searches for answers in the unsolved murder of her 14-year-old daughter until new DNA technology changes everything.

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

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 beloved Staten Island teacher is found dead in the home she shared with her husband; an unknown number in her cell phone leads investigators to ultimately unearth her killer.

A popular teacher is savagely murdered in her home; there is an arrest, a trial, and a conviction, but when a bombshell comes in after the verdict, the convicted murderer is given a chance at freedom.

A community is left in shock when a Cornell student and star athlete gets caught in the middle of a homicide investigation.

Kelli Bordeaux was just starting what she hoped to be a long career in the military, but fate had other plans. When she vanished, friends and family launched a frantic search, but it was stranger hell-bent on justice who uncovered the ugly truth.

A man is shot and killed while picking up his daughter for a court-ordered visit.

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.

An investigation into the murder of a beloved couple in South Carolina reveals a feud and divides a family.

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.

A mother, her son and a cousin are kidnapped by terrorists while on vacation; a father turned negotiator tries to end the international hostage drama, but the price of freedom is a huge ransom.

After a woman reports a prowler, police find her Olympic bronze medalist husband dead in their backyard.

After finding his wife and two children dead in his garage, a former Indiana state trooper spends 13 years trying to clear his name.

The fire broke out before dawn. After the smoke cleared, a mother of two young children was found dead. It was the tragic end to a life that held so much promise, but for investigators, it was just the beginning. Was this an accident or murder?

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.

It takes a special eye to spot the thing that's out of place at a crime scene; in this case, that thing looks so insignificant, no one even knows what it is or what it means; it takes a team of determined investigators almost two decades to find out.

Kevin and Morgan Mengel were happy at first, but when the marriage went bad, he went missing. Police wondered if he simply left, but a family’s relentless pursuit lead to a stunning confrontation and, eventually, the truth.

Bob McClancy was a beloved detective. When his death was ruled a suicide, loved ones were suspicious. United by grief, his widow and good friend found themselves falling in love. Then Bob’s son started asking questions and uncovered a secret.

When a woman returns two days after being reported abducted, authorities believe it's a hoax until a similar crime forces them to take another look.

New interviews with insiders reveal how career criminal Charles Manson convinced his followers to kill innocent victims and deliver him the fame he craved.

An investigation of abuse allegations against one of the owners of the religious reform school Circle of Hope.

A San Diego mother suddenly vanishes in 2014; nearly two years later, her body is found in San Diego Bay, but medical examiners say she has only been dead for a month or two.

Big sky country and a dangerous highway set the scene of a fatal car crash; determining if the tragedy was an accident or a crime and the secrets behind the truth hiding in text messages sent just before a car crossed the line.

Chiquita Tate was growing her reputation as a tenacious defense attorney but her promising career was cut short when she was murdered. Police had a challenge. At work, she dealt with tough clients, and at home, she was going through a rough time.

An investigation into the poisoning of Wisconsin mother Julie Jenson takes a surprising turn when detectives learn that she wrote a letter days before her death pointing to a possible suspect.

He was the hardworking dad, she the doting mom. In the still of the night, strangers armed with knives destroyed all they had built together. Turns out, someone was hiding an ugly secret. Police would hatch an elaborate plan to uncover the truth.

Connie and Larry Hoagland built a life centered on faith and family. Then, a vicious attack threatened it all. Someone wanted Connie dead. But who? After a bomb exploded underneath her car, secrets started to emerge.

They were a married couple meeting for a secret Valentine's Day rendezvous. The secluded spot became a crime scene when Richard Schoeck was found shot dead there. Turns out, the rendezvous wasn't the only secret in their lives.

Corey Parker had plenty of admirers, but maybe one of them liked her too much. Her murder jolted a sleepy seaside community with the chilling realization that a killer was walking among them.

When former Arkansas State Senator Linda Collins 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.

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.

After a house fire in suburban New Jersey, investigators discover a twisted love triangle filled with jealously, love and murder.

Police believed a pair of double homicides in Nebraska, five years apart, might be connected. Investigators working to solve the crimes feared the killer might strike again. Could they catch him in time?

At first, the fatal fire that swept through the home of a young couple looked like an accident then investigators took a closer look and what they discovered about the fire, and this couple, left them burning with suspicion.

After a young Army veteran disappears, detectives uncover a cryptic 911 call placed 11 days before she went missing, which exposes a twisted story -- and the truth.

Was he missing or was he hiding? On the surface, it didn't make sense: He had a wife, a good job, a daughter he loved. Investigators were told he also had a secret and they went on an undercover mission to find the truth.

When Todd Winkler was arrested for killing his wife Rachel, he claimed self-defense. Investigators learned Rachel wasn't the first Mrs. Winkler to die and traveled cross country to understand what happened on that camping trip a decade earlier.

Rapper Meek Mill discusses controversies surrounding the criminal justice system, the parole system, wrongful convictions, challenges faced by law enforcement, alleged police abuse, and other topics.

Oscar Pistorius shoots and kills his girlfriend just eight months after competing in the London Olympics, telling police that he believed she was an intruder and that he was acting in self-defense.

In Stephenville, TX, in 1987, Susan Woods doesn't show up for work for 2 days; she is discovered by her father dead at home in her bathtub. As police search for answers, they find a trail of victims - men associated with Susan, including her estranged husband living in Indianapolis. But the case wasn't solved for almost 2 decades.

When a Colorado mother vanishes, the detective discovers a connection to a previous assault.

Investigating whether a toddler left in the car for seven hours while his dad was at work was a heartbreaking accident or murder.

After a house fire in suburban New Jersey, investigators discover a twisted love triangle filled with jealously, love and murder.

A top doctor known for saving lives found himself fighting for his own after he was poisoned. Investigators immediately started looking into the women in his life, wondering if one relationship was toxic.

It began with a young mom abducted at gunpoint. Her family and veteran investigators spent desperate days trying to find out where she was but they never could have guessed WHO had her and WHY.

Detectives often hit dead ends that can stop them cold but, for one young detective, dead ends were just another place to start. She'd beaten the odds in her own life. Now, she was determined to beat them on the job using her head and her heart.

Private First Class Karlyn Ramirez had a job she loved and a baby she adored. Then, she was shot dead in her home. Her killer thought he'd covered his tracks, but investigators uncovered a plot so devious, it defied imagination.

It was Friday the 13th and something sinister was about to happen: a chilling double murder in an upscale home. The evidence seemed to tell a clear story. Then investigators discovered a marriage filled with secrets and a story that didn't add up.

Detectives believed two young children witnessed the unthinkable, the brutal murder of their mother. The prosecution's case would be built around what they thought those kids observed, but was another version of events possible?

Missing wife. Grieving husband. Turns out, both had secrets. Jen Ramsaran vanished just before Christmas and detectives needed to know if her online life held the key to this mystery or if the answer was closer to home.

A mom suddenly vanishes and a dad is under suspicion, but there was no body, weapon or eyewitness, and surprises cropped up along the way.

She was a young mom, pregnant with her second child, when she was gunned down on her way to work. Police zeroed in on the men in her life. To help find her killer, her sisters became amateur detectives and uncovered a secret.

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

Four years after a 28-year-old dies after hosting a New Year's Eve party, a jury must decide if it was suicide or murder.

After Florida teacher Denise Hallowell is found murdered in her home, investigators examine her family's tumultuous past in their desperate search for a killer.

A young man from small town Indiana heads to Japan where he falls for a beautiful woman from a land nearly as far away. Then, one of the biggest natural disasters in history hits. With whole towns being wiped out, would they survive?

Sandra Galas was born and raised in paradise. So how did something so ugly happen there? Police investigated two men in Sandra's life, but the case went cold. Her father refused to give up, relentlessly pursuing the truth for more than a decade.

After trumpet player Scott Sessions fails to show up for a scheduled gig, his family learns his body was abandoned in the remote Colorado Rockies; as the investigation narrows in on two suspects, a second murder catches police by surprise.

After a young mom is found dead on the side of a country road, 40 miles from her Knoxville home, investigators scramble to figure out how she ended up there.

Debra Newell thought she found Mr. Right but her daughters sensed something wrong about John Meehan. They started digging into his past and their search for answers exposed a dangerous con man but would the truth be discovered too late?

Amber Dubois disappeared in the San Diego area, and the search turned up nothing. Then, a year later, Chelsea King disappeared in a neighboring town. Investigators were determined to find out if the two cases were connected. Will these girls be found together and alive?

Carrie Olson had a heart of gold and a new man in her life. Then, she went missing. Loved ones launched a desperate search for answers, but investigators wondered if one of them was hiding a dark secret.

After New Jersey mother Michelle Lodzinski reports that her 5-year-old son has vanished from a carnival, detectives embark on a decades-long investigation until a family member identifies a key piece of evidence pointing to a potential suspect.

Brandy Daniels believed someone was stalking her. Then, the single mother was found slumped over in her car, shot dead. Investigators would spend years navigating the twists and turns searching for her killer.

Uncovered pages from John Hinckley Jr.’s diary are revealed. Hinckley began writing after he was arrested for trying to assassinate President Ronald Reagan.

When a model and up-and-coming YouTube celebrity is found dead in their pool, police question her husband see if he can provide any answers.

She was a divorced mother excited about her next chapter in life. Then, five gunshots shattered her plans. Proving who murdered Joan Lockwood was a daunting task for police. An ominous killer was still out there and her family was living in fear.

Melissa Lewis disappears, leaving signs of a struggle and a strange orange mist behind her; her boss goes missing and leaves behind an even bigger mess, and a missing fortune.

Lauren Giddings was smart, charismatic and a newly-minted law school graduate. She had dreams of becoming a public defender, then she was brutally murdered. Her killer tried to pull off the perfect crime, but a secret recording exposed the truth.