When a young, handsome veterinarian is found dead in his home in Montana, the mystery remains unsolved for nearly two decades.

The homicide of private first class soldier and young mother Karlyn Ramirez; a glimpse into the FBI's crime lab and an in-depth look at how multiple agencies uncovered a plot that spanned several states and prompted suspicions of espionage.

Three people are shot dead in a small Texas town, including two respected prosecutors; a clue that would connect the dots remains a mystery until an eagle-eyed investigator makes a stunning discovery.

When Detective Bill Clark investigates a disappearance, a trail of clues leads him to a young film director; Clark worries that the mystery was a hoax staged by a master storyteller; however, it turns out the script is much darker.

When a young mother, her daughter and a friend vanish after a visit with extended family, those close to the victims suspect foul play; without proof, the mystery deepens until a member of one of the feuding families makes a shocking admission.

A bar owner's body is discovered in a quarry pond; his killer remains a mystery to investigators for years while his increasingly divided family fears one of them must be the murderer.

The owner of an extreme-sport venture is found shot dead in his warehouse; police suspect a history of bad business may be to blame, until a contentious family past begins to cast doubt on his devoted son's innocence.

A mother is found savagely murdered in her upscale home, leaving a father and son to blame each other; their airtight alibis lead detectives to a murder plot involving an estranged sibling with nothing to lose.

The Colegroves are beloved in their small town, but when they're brutally murdered in what appears to be a targeted attack, a bitter dispute within their family is revealed, pitting the surviving brothers against each other.

Air Force veteran falls victim to unthinkable crime; search for the truth reveals a twisted tale of revenge and two suspects no one expected.

A loving husband and father goes missing, triggering a police investigation that uncovers an illicit romance fueled by deadly passion.

A good Samaritan falls victim to a brutal crime, leading police on a manhunt for a pair of killers fueled by envy and rage.

When an esteemed California pastor is found executed in an almond orchard, investigators turn to his complex love life for answers; allegations of blackmail are exposed, and a vindictive conspiracy is ultimately brought to light.

When a crimespree leaves five dead, South Carolina authorities kickstart a multi-state investigation to capture a desperate couple on the run; the case grows more complicated whenpolice are faced with conflicting accounts of the murders.

After a young mother is murdered in broad daylight, Texas authorities are on a hunt for a masked gunman; the ensuing investigation uncovers a bitter custody battle and a vicious plot born of obsession.

Crosby, Tenn., is shocked when a beloved father and pastor is found dead outside a ransacked house; police question if this was a robbery gone wrong until an unexpected witness comes forward to reveal the disturbing truth.

A welfare check confirms the worst when a woman is found brutally murdered on her couch; the ensuing investigation leads authorities from Oklahoma to Arkansas where conflicting stories of a crime motivated by greed and jealousy are uncovered.

When a missing man's bullet-riddled body is found off the side of a road, police must dig into his complicated past to uncover the truth; the case hits a standstill until information about the victim's car comes to light and reveals a toxic romance.

When a shocking crime is committed in broad daylight that leaves a young man dead on the street, the investigation uncovers a personal vendetta; in exclusive prison interviews, the killer couple each share their version of events.

A young woman vanishes from small-town Oregon after heading to a Halloween party, leaving her family devastated and detectives hitting dead ends. Years later, new evidence from an unlikely source reveals the gruesome plan to silence a vulnerable victim.

After a successful Korean-American business owner is killed during a home invasion, detectives believe his murder could be tied to a string of Philly crimes against businesses, until they uncover that the mastermind is someone much closer to home.

When the mysterious death of a 23-year-old mother in New Mexico goes unsolved, her family searches for answers.

When Ohio mother Heather Bogle goes missing, a detective identifies multiple suspects, until he himself comes under scrutiny for his investigation.

Two young girls in Washington are snatched in broad daylight while riding their bikes; the case goes unsolved for decades, until a new detective with a local connection to the story tries to solve the mystery.

Kathy Blair is found stabbed to death in her bedroom in Texas; the gruesome crime scene puzzles investigators until an unlikely clue that is captured in the darkness puts them on the trail of a depraved killer.

After the battered body of a young woman is found dumped at a landfill in Lubbock, Texas, detectives race to collect evidence hidden in acres of trash.

Marilyn McIntyre's gruesome murder goes unsolved for decades until a phone call resurrects the investigation; possible evidence may exist with the victim, even being buried 30 years underground.

When a woman finds her husband dead of an apparent suicide by poisoning, suspicious detectives must exhume the body of her first husband to unearth the truth.

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.

Two young women come to New York with big city dreams, but a chance encounter triggers a sequence of events that shatters those dreams forever; detectives must piece together a series of puzzling clues to bring the killers to justice.

When a patrol officer discovers a dead body in the back of a taxi, detectives must rely on a trail of digital breadcrumbs and a mysterious passenger to track the killer.

When a Philly radio personality is killed in her lavish Shore home, the years-long investigation reveals an undercover informant, an intricate murder-for-hire plot, and a vast trafficking conspiracy.

After a successful Korean-American business owner is killed during a home invasion, detectives believe his murder could be tied to a string of Philly crimes against businesses, until they uncover that the mastermind is someone much closer to home.

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.

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.

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.

A woman who appeared to have taken her own life told her sister that, if anything were to happen to her, there was a note in the china cabinet.

When an aspiring model turns up dead, police suspect her boyfriend. But must dig deeper for clues when he is cleared.

Tiny fibers and an asthma inhaler are the clues that lead officers to the killer of an off-duty policeman.

Investigators search the world of high rollers and offshore betting to solve the first triple homicide in Verona, Wisc.

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; authorities track down the car to find critical evidence.

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.

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 is killed in a mysterious car crash, but the evidence at the scene lead investigators to believe it is not an accident; forensic science reveals what really happens, and the truth devastates three families.

A family of four is found dead inside a partially burned Indiana home; when investigators discover that two of the victims died from gunshot wounds, the race is on to determine whether the killer was a stranger or someone closer to home.

An elderly couple and their daughter are found beaten and stabbed in their home in central Texas; from potential family members to disgruntled employees, investigators consider many suspects and leads before finding answers in an unlikely place.

After a mother of two mysteriously vanishes, a young video gamer shares a tale with detectives that leads to the discovery of a diabolical plot.

After a mother of two mysteriously vanishes, a young video gamer shares a tale with detectives that leads to the discovery of a diabolical plot.

The father of an Alabama teenager calls the police after he returns home to find his son had thrown a party, leaving the place trashed; 11 minutes after the deputy leaves the house, another 911 call is placed reporting a shooting at the residence.

A planned romantic weekend turns into a nightmare for one young couple; a fight sends two women to segregation, and for one of the combatants, the isolation takes its toll.

One alleged gang leader is charged with assault shortly after his arrest and now his arch-rival is has been booked into the jail as well; an admitted identity thief and meth addict clings to hope for a better life.

A gang leader has his authority challenged by another inmate but questions arise over whether the challenger is who he says he is; in the women's wing, one inmate's personality divides her housing unit; before long, verbal altercations turn violent.

Inmates at Tennessee Prison For Women gain career skills by taking part in a cosmetology program.

It all began when a best selling author found his wife at the base of the stairs; the story makes headlines and has been covered for more than a decade; Michael Peterson answers questions.

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.

A convict is offered a deal as tempting as it is dangerous; he must go undercover in a psychiatric hospital to get information from a suspected serial killer in order to win his freedom, but there's no guarantee he'll get out alive.

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.

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

She was a beaming bride; it was a haunting death; Sarah and Ryan were newlyweds when she drowned in the bathtub; did she die of natural causes or was it deliberate; it took three trials to find the truth.

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.

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.

When Dr. Teresa Sievers is found murdered in her kitchen, detectives struggle to find any leads until an unexpected tip changes everything; the woman who helped investigators speaks out.

For more than 30 years, "Dateline" has brought viewers investigations into some of biggest mysteries in America. This entry in the franchise takes a second look at some of the most mysterious cases of recent history. Hosted by Emmy-winning journalist Craig Melvin, the show explores the stories through firsthand accounts told by people who are close to the crime, including investigators who dedicated their time to the cases and family members who are still trying to confront the tragedies that befell their loved ones.

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.

A small Ohio town is left in shock after a local coal miner is found fatally shot in his basement; as investigators dig into his personal life, a secret affair reveals a surprising suspect.

The investigation into the death of a pregnant woman just months after she wed her high school sweetheart reveals secret lives and feuds.

The investigation into the death of a pregnant woman just months after she wed her high school sweetheart reveals secret lives and feuds.

Investigators didn't know if Kathy Heckel was a missing person or murder victim; decades later the case is reopened by a new detective.

When a pregnant St. Louis elementary school teacher is found shot to death in her apartment, an unusual gun silencer, missing money, and the victim's own meal plan help unlock a shocking and devious murder plan.

When a successful Palm Springs art dealer goes missing, the search leads detectives through a complex web of charismatic conmen, luxury shopping sprees, and one small piece of evidence that uncovers an elaborate murder plot.

When a beloved mom is murdered in her suburban Connecticut basement, and her husband is found zip-tied to a chair, detectives pursue a camo-clad intruder and a twisted trail of digital evidence that uncovers a diabolical plan, months in the making.

A young woman vanishes from small-town Oregon after heading to a Halloween party, leaving her family devastated and detectives hitting dead ends. Years later, new evidence from an unlikely source reveals the gruesome plan to silence a vulnerable victim.

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.

Andrea Canning looks back on the case of a fitness tracker who helps detectives solve the mystery of a young woman's death in Wisconsin; Andrea confronts the killer in a tense interview.

When a star athlete at an Ivy League university goes on trial for murder, sparks fly in the courtroom; the trial ends with a stunning decision that Dennis Murphy will never forget, but the surprises in the case are just beginning.

A California woman's two former husbands are mysteriously murdered nearly 20 years apart; Keith Morrison reflects on the case that sent him halfway across the world on a hunt for answers.

A pink gun leads to an arrest when a complicated Texas love triangle ends in murder, but new evidence makes investigators rethink the case.

When Leslie Neulander dies after what seems like an accidental fall in the shower, her book club friends join forces to seek justice on her behalf; Andrea Canning reflects on some of the most determined women she's ever met.

An apparent home invasion in Minnesota leaves Heidi Firkus dead and her husband hospitalized; for Blayne Alexander, getting to know Heidi through loved ones was a privilege; for investigators, learning about Heidi helps solve the case.

After a mother is found murdered in her Virginia home, her son embarks on a 20-year quest for justice; for Josh Mankiewicz, this cold case was one of the strangest he's ever covered. He looks back at the reasons why.

After a woman is murdered, a secret is exposed but a mystery still looms; Andrea Canning re-examines the story she first covered years ago; new developments lead to an unexpected conclusion and an interview you have to see to believe.

When a small-town Alabama resident is murdered, rumors involving a local pastor begin to swirl.

A love triangle leads to years of stalking, property destruction, threats and murder.

A love triangle leads to years of stalking, property destruction, threats and murder.

The murder of a young schoolteacher in Pennsylvania goes unsolved for years, but investigators discover a new tool that may finally help unlock the murderer's identity.

A motocross champion and a model tie the knot in Las Vegas, never knowing their wedding vows will trigger a mysterious murder plot and a decades-long investigation.

A dental student rejects her boyfriend's marriage proposal, then dies under mysterious circumstances; when another victim dies under similar circumstances 14 years later, investigators must determine if the two cases are fatally intertwined.

When police investigate the murder of a Private Investigator the trail leads them to a wealthy woman who had affairs with both a father and his son.

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

Questions are raised when a teenager awakens to discover her father, a popular high school drama teacher, stabbed to death in his bedroom.

A young teacher's assistant is raped and fatally shot in the middle of the night; her roommate, awakened by the noise, calls 911 and reports it as a suicide, beginning an intriguing mystery of motive, heartbreak and a tragic discovery.

The romance between two academy-bound high school sweethearts turns deadly when a youthful indiscretion leads to cold-blooded murder.

When a family falls victim to a devastating crime, the search for the killers lays bare a twisted romance and a motive no one can believe.

A loving couple is gunned down outside their home, setting in motion a cross-country investigation to track down an unlikely killer and a motive for revenge.

After a soldier is murdered on New Year's Eve, the quest for the truth reveals a deadly plot driven by temptation and obsession.

A beloved police officer's murder takes years for his brothers in blue to solve, ultimately revealing a conspiracy born out of lust and greed.

A shocking double murder and kidnapping springs police into action to stop a pair of deadly lovers before they can kill again; a surviving victim recounts the harrowing ordeal.

When the wife of an Army medic is murdered in her Hawaii home, the investigation reveals a sordid tale of secrets, lies and a twisted romance that captured headlines across the country.

The disappearance of a well-respected businessman leads to an investigation that exposes a secret romance fueled by lust and greed.

An Amish community is turned upside down when a young wife and mother is found murdered inside her home, leading police to look deeper within the community, and exposing a secret romance that triggered a deadly conspiracy.

A beloved Oklahoma father is discovered murdered inside his home and the search for his killer uncovers a forbidden romance and a deadly double-cross.

A young couple becomes the target of a nationwide manhunt after police connect the deadly lovers to two grisly murders in different states.

A horrific killing spree leads Pennsylvania investigators on the hunt for two young lovers willing to do whatever it takes to evade the law.

The sudden disappearance of a wealthy couple rattles their small town and launches an investigation that exposes a web of deception, greed and a blood-soaked betrayal.

When a wealthy couple falls victim to a deadly home invasion, the search for the killers exposes both a twisted relationship and a family betrayal no one saw coming.

In 2001, intern Chandra Levy disappears from Washington, D.C., then rumors surface of an affair between the beautiful intern and a married congressman; one year later, Levy's body is found in Rock Creek Park, and her murder goes unsolved to this day.

When Wendy Ratte, a free-spirited mother of two, goes missing, police go under cover to crack the case.

When Wendy Ratte, a free-spirited mother of two, goes missing, police go under cover to crack the case.

When a San Diego woman who is near death arrives at an emergency room, the FBI and local law enforcement are called in to try to solve a medical mystery and a horrific crime.

A successful businesswoman and mother of three is found shot in her office; the investigation into her death leaves a family divided.

Two decades after a Jacksonville, Fla., woman goes missing, her son solves the mystery that haunted his childhood.

A woman is murdered in a home invasion; her best friend and neighbor is shot the following night; investigators unearth disturbing secrets that suggest the cases may be linked.

When Cathy Torrez never comes home after work, her family fears the worst; an intensive search ends after her car is found, with her body in the trunk; it take years to get to the truth.

When former NFL star Antonio Armstrong and his wife, Dawn, are murdered in their own bed, detectives uncover a stray bullet, threatening note and web of complicated family dynamics that ultimately unravel, revealing a dark betrayal.

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.

The ambush-style murder of a human rights activist confuses investigators; but when her boyfriend's brother is also gunned down, police uncover a plan to commit murders in the name of honor.

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.

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.

When a Philly radio personality is killed in her lavish Shore home, the years-long investigation reveals an undercover informant, an intricate murder-for-hire plot, and a vast trafficking conspiracy.

After a successful Korean-American business owner is killed during a home invasion, detectives believe his murder could be tied to a string of Philly crimes against businesses, until they uncover that the mastermind is someone much closer to home.

After a talented artist and musician goes missing, the investigation into his disappearance leads to a gruesome discovery in a historic Philly cemetery, revealing a sinister series of events.

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.

When a young pregnant mother goes missing in Virginia, her family embarks on a search, but the case goes cold; years later, investigators find a woman who may hold the key to solving the case.

After a talented artist and musician goes missing, the investigation into his disappearance leads to a gruesome discovery in a historic Philly cemetery, revealing a sinister series of events.

Mama Edna, a pillar of the Haitian community in Brooklyn is adored by all as the matriarch of East Flatbush; when she is found murdered in her home, NYPD uncover a Voodoo practice that leads them to a web of the unthinkable.

When an aspiring writer and painter in the vibrant Soho art scene of the early '80s is found murdered just two days after her debut book is published, her devastated husband offers a critical clue.

A single mother who is pregnant with her second child says goodnight to her 12-year-old daughter in their Brooklyn home at midnight; by morning, she is found dead miles away in the Hudson River of midtown Manhattan.

Years after a woman is murdered in the back of her comic book store, new evidence is discovered that sends the investigation in a surprising direction.

Years after a woman is murdered in the back of her comic book store, new evidence is discovered that sends the investigation in a surprising direction.

A 21-year-old college senior is shot and killed in a public park just months before her graduation.

Randy Baker finds his calling as a counselor then winds up dead.

Pamela Smart's husband is found murdered; police investigate and discover that Smart is keeping a big secret.

After two best friends are reported missing, Texas and Minnesota police team up to bring a suspected serial killer to justice; an accomplice shares her side of the story from behind bars, revealing chilling details of the crime.

A North Dakota community is rocked after a beloved mother is found stabbed to death in her home.As police look to those closest to her for answers, an informant comes forward and exposes a dangerous couple's vengeful plot.

When authorities respond to a car fire in rural Michigan, they find a charred body discarded nearby; as the investigation unfolds, the victim's phone records point to a vicious plot stemming from a dangerous infatuation.

Just months before his retirement, a missing trucker's body is found in a remote creek; as detectives run out of leads, a seemingly minute detail breathes new life into the investigation revealing two lovers with a nefarious plot.

When an esteemed California pastor is found executed in an almond orchard, investigators turn to his complex love life for answers; allegations of blackmail are exposed, and a vindictive conspiracy is ultimately brought to light.

When a crimespree leaves five dead, South Carolina authorities kickstart a multi-state investigation to capture a desperate couple on the run; the case grows more complicated whenpolice are faced with conflicting accounts of the murders.

After a young mother is murdered in broad daylight, Texas authorities are on a hunt for a masked gunman; the ensuing investigation uncovers a bitter custody battle and a vicious plot born of obsession.

A welfare check confirms the worst when a woman is found brutally murdered on her couch; the ensuing investigation leads authorities from Oklahoma to Arkansas where conflicting stories of a crime motivated by greed and jealousy are uncovered.

When a missing man's bullet-riddled body is found off the side of a road, police must dig into his complicated past to uncover the truth; the case hits a standstill until information about the victim's car comes to light and reveals a toxic romance.

When a shocking crime is committed in broad daylight that leaves a young man dead on the street, the investigation uncovers a personal vendetta; in exclusive prison interviews, the killer couple each share their version of events.

When a young soldier goes missing just two days after his wedding, authorities fear the worst has occurred in their small Ohio town. Rumors of a sordid affair lead to a shocking betrayal that ended in not one, but two horrific crimes.

A botched bank robbery and bomb-clad hostage lead Erie detectives through a bizarre, convoluted scavenger hunt that starts with a pizza delivery, ends with multiple victims, and was concocted by a deranged perpetrator who has plans to kill again.

The death of a police officer leads to a search for her killer; her shooting may be payback for an old arrest, or may be closer to home.

When a young soldier goes missing just two days after his wedding, authorities fear the worst has occurred in their small Ohio town. Rumors of a sordid affair lead to a shocking betrayal that ended in not one, but two horrific crimes.

A botched bank robbery and bomb-clad hostage lead Erie detectives through a bizarre, convoluted scavenger hunt that starts with a pizza delivery, ends with multiple victims, and was concocted by a deranged perpetrator who has plans to kill again.

In a jailhouse interview, Traci Wolfe reveals the catalyst that sparked an uncontrollable rage and ended in her husband's gruesome death; holding nothing back, she now reflects on the crime that landed her in prison for life.

Serving a life sentence for the brutal stabbing of her own mother, Taylor Marks discusses the murder on camera for the first time ever; she claims she wasn't the mastermind behind the crime, but she knows who is.

Just weeks away from completing his sentence, an inmate is accused of murdering his cellie; a large woman with a personality to match loses everything to meth; an inmate causes a disturbance on the jail's transfer bus.

Solitary confinement is one of the most common methods for disciplining inmates, but it's also a very controversial issue.

A look back at the 1997 murder of fashion designer Gianni Versace, including interviews with his long-time partner Antonio D'Amico, model Beverly Johnson, fashion journalist Hal Rubenstein, author Maureen Orth and more.

A look back at the 1997 murder of fashion designer Gianni Versace, including interviews with his long-time partner Antonio D'Amico, model Beverly Johnson, fashion journalist Hal Rubenstein, author Maureen Orth and more.

When a college student is found dead after a party, his mother gets the help of a new friend to get the case in front of a jury.

Three people are shot dead in a small Texas town, including two respected prosecutors; a clue that would connect the dots remains a mystery until an eagle-eyed investigator makes a stunning discovery.

The original jurors who found Hollywood legend Robert Blake not guilty of murder after the shooting of his wife Bonnie Lee Bakley discuss their controversial verdict over a decade later.

A sexy teacher and her teenaged lover hatch a plot that rocks a nation.

A drug-crazed couple set off on a multi-state crime spree; a modern-day Bonnie and Clyde.

A salesman and young hustler form a partnership in business and in romance; when a medical tragedy proves to be anything but natural, police uncover a twisted tale of sex, deception and conspiracy.

A couple of drifters befriend a good Samaritan with horrific results.

Two ex-lovers reunite but their affair turns deadly when they conspire to get rid of his wife.

An honor student falls in love with an ex-convict and becomes involved in a killing spree.

When a beloved grandmother falls victim to a brutal crime, the search for her killers reveals a torrid romance between two young lovers willing to do anything to get what they desire.

The unexplained disappearances of a young mother and her two sons in 1980 lead investigators on a three-decade quest for justice, exposing multiple murders and a homicidal love affair that left untold suffering and carnage in its wake.

A loving couple are found shot to death in their home, forcing police to pursue a pair of desperate lovers on a cross-country manhunt.

When a young woman is found tortured and killed after a camping trip with friends, police must unravel two couples' conflicting stories of depravity to bring her killers to justice.

When a young soldier goes missing just two days after his wedding, authorities fear the worst has occurred in their small Ohio town. Rumors of a sordid affair lead to a shocking betrayal that ended in not one, but two horrific crimes.

A foreclosure leads police to a concrete grave and a twisted plot of deception, fraud and murder, as one woman goes to extraordinary lengths to avoid justice.

A violent home invasion leads to suspicion about the victim's stepdaughter and a mystery man, but a startling confession reveals a more intimate betrayal.

A popular cab-driver is shot dead on the job, but the search for his killer reveals his wife's secret prison visits, a torrid affair and a possible conspiracy.

The murder of a beloved widower leaves police wondering what secrets his marriage, to his much younger wife, might be hiding.

An Air Force sergeant is gunned down in his garage revealing an elaborate conspiracy with an unlikely mastermind.

A botched bank robbery and bomb-clad hostage lead Erie detectives through a bizarre, convoluted scavenger hunt that starts with a pizza delivery, ends with multiple victims, and was concocted by a deranged perpetrator who has plans to kill again.

After a talented artist and musician goes missing, the investigation into his disappearance leads to a gruesome discovery in a historic Philly cemetery, revealing a sinister series of events.

When a wife calls 911 to report her husband has been shot on a country road in Texas, officers rush to the scene.

Recently uncovered pages from John Hinckley Jr.'s diary, which he began writing after he was arrested for trying to assassinate President Ronald Reagan; an interview with the officer who questioned Hinckley after the attempted assassination.

A man uses a dating site to meet and murder a college student.

For Keith Morrison, this case stands out as an unusual mystery; the crime seemed arbitrary with no apparent motive; there was a confession which might have ended the investigation but that was only the beginning.

A loving grandmother from a traveling community is found brutally murdered, shocking all; investigators soon uncover a web of lies, identity theft and millions in insurance fraud that point to who killed this sweet old lady.

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 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.

The abduction and murder of a pregnant woman and her fiancé from their Decatur home sends shockwaves throughout Atlanta; ransom calls and voicemails turn into digital breadcrumbs for investigators to track the killers down.

Twin daughters find their mother stabbed to death in their quaint suburban home, and the pressure for detectives to deliver justice is on; but when the shocking truth behind the murder comes out, the Atlanta community is left stunned and heartbroken.

When a beloved Staten Island mother vanishes, NYPD detectives have a gut feeling she didn't run off and have trouble believing she abandoned her family; as they retrace her last known whereabouts, CCTV footage leads them to a horrific discovery.

In the most expensive zip code in Manhattan, an aging, eccentric art collector is found strangled in his apartment.

When the owner of a Brooklyn pizzeria is gunned down in broad daylight in his backyard, the news publishes mafia theories, and the FBI joins the NYPD to investigate.

A veteran police officer gets attacked in the line of duty; detectives make it their mission to bring his killer to justice; as they investigate a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

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.

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.

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.

A twelve-year-old girl claims that she was abducted and sexually assaulted; her story seems unbelievable until police discover fibers on her clothing.

A man calls for help when his wife has a fatal fall down the stairs; numerous amount of bloodstains make police suspicious.

A decade old case reopens, and a few seconds of a 911 call enable investigators to determine who is responsible for a murder.

A flawed envelope is an unlikely clue to identifying a killer who laced a water cooler with cyanide and caused the death of a woman.

A mussel diver and his fiancée are found dead in their burnt home; a tiny clue points to arson and murder.

For ten years, the disappearance of a college co-ed remained a mystery; new scientific testing cast a different light on a man who had been a suspect all along.

A popular therapist suffers a deadly attack in her Hollywood Hills home and police must trace a trail of deadly obsession and rage to find her killer.

The murder of a popular hairdresser in Cleveland leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

A California woman's two former husbands are mysteriously murdered, nearly 20 years apart.

A California woman's two former husbands are mysteriously murdered, nearly 20 years apart.

When a South Carolina coroner arrives at the scene of a car accident to find his friend deceased, he notices some unusual markings on her face and begins to think her death looks suspicious.

Yingying Zhang, a student at the University of Illinois, misses a campus bus by seconds and then vanishes; as police trace the final moments before she disappeared, they discover a dark secret on campus that takes the case in a shocking direction.

Ashley Young has an active online presence and loves posting on social media; when she suddenly stops communicating with loved ones, her mother launches a search to find out why; a gruesome discovery leads to a tragic answer.

When a loving father of two is gunned down on his driveway, police uncover a hidden affair and workplace grudges before a nervous witness and chilling confession reveal a vicious vendetta from a killer no one expected.

When a family that runs a beloved vet clinic is gunned down, police investigate disgruntled tenants, a pet owner with an ax to grind and an estranged son; the case stalls until detectives uncover a twisted plot by someone who seemed above suspicion.

Days after Lauren Giddings vanished, her body was discovered steps from her apartment; to catch her killer, detectives had to untangle a confusing web of clues and find a piece of evidence no one was supposed to see.

A dad is murdered in his garage; evidence at the crime scene leaves a puzzle for police; a neighbor's camera reveals a clue that investigators hope was key to solving the mystery.

A man shoots and kills two teenagers breaking into his home; he says that he acted in self-defense; the investigation uncovers a piece of evidence that tells a different story.

A talented, young art student is murdered; the killer left no fingerprints and no DNA; police zero in on three fellow students and, soon, the dark portrait of a killer began to emerge.

In Wisconsin, Steven Avery and his nephew, Brendan Dassey, are convicted of killing Teresa Halbach in a case that defies easy answers.

Fitness executive Nicole Pietz is married to the man of her dreams, then she goes missing after failing to show up for dinner with her husband and friends.

Debbie Kelly and Lars Itzo make their marriage of opposites work; then, Debbie is shot dead in the dark of night; investigators ask whether her death is a case of mistaken identity or the bloody end to a marriage gone bad.

Brittany Eldridge was nearly nine months pregnant when she was found dead in her apartment; investigators focused on two men they believed had a possible motive.

Diana Lovejoy and her husband welcome a baby boy, but their marriage crumbles; a bitter custody battle follows; fearing for her safety, Diane turns to a man skilled in self-defense, but as it turns out, someone else is in grave danger.