A massive manhunt ensues after Lois Riess murders her husband in Minnesota and flees to Florida, where she kills and steals the identity of a woman she had just met.

In the still of the night, strangers armed with knives destroy the lives built by a hardworking man and his doting wife.

A mystery looms over a small New York town when a woman is murdered and a stunning secret is exposed; more than a decade later, new developments lead to an unexpected conclusion.

A mystery looms over a small New York town when a woman is murdered and a stunning secret is exposed; more than a decade later, new developments lead to an unexpected conclusion.

A pregnant woman vanishes before her own baby shower and her worried family raises the alarm; detectives unravel a chilling mystery.

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.

Roger Brooks, popular maitre d' at one of the oldest restaurants in New York, is found slain in his apartment on the city's famous Restaurant Row; detectives discover a hidden side to the victim, and the chilling possibility of other victims.

When a young banker disappears, police piece together her final moments, leading them to a professional who's not as he presents himself.

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.

A chiropractor is found bludgeoned to death in his home outside Philadelphia; investigators take a hard look at those closest to him, but soon learn the murderer is someone they least expect.

A young woman appears strangled and posed in the Kensington neighborhood; when more victims are found assaulted in an eerily similar fashion, detectives race against the clock to find the perpetrator before he strikes again.

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.

The parents of Kristin Smart speak out in an interview following the sentencing of their daughter's killer.

After an apparent brazen home invasion during the holiday season in a Connecticut community leaves Connie Dabate dead, investigators discover a silent witness that cracks the case wide open.

25-year-old Chantay Blankinship's remains are found at a rundown building that locals call the Haunted House; for Blayne Alexander, this case juxtaposes two places that represent good and evil, a church and an abandoned farmhouse.

Authorities take two years and three trials to solve the shooting death of the wife of an FBI agent in the kitchen of her family's Virginia home.

Texas detectives investigating the murder of 22-year-old Molly Matheson uncover a trail of sexual assault crimes; Josh Mankiewicz is still disturbed by what survivors connected to the case told him about their fight for justice.

When 17-year-old Alissa Turney disappears, it takes years before detectives treat her case as a homicide; Andrea Canning reexamines the mystery and the dark family secrets the investigation unearthed.

It is a case Josh Mankiewicz cannot forget because, while a student-athlete did everything right to keep herself safe, others did not; after she was found murdered, investigators learned she reached out for help multiple times before her death.

A mother is found dead in a house fire but an autopsy reveals a brutal murder; the case goes cold for years until a shocking confession is made.

A mother is found dead in a house fire but an autopsy reveals a brutal murder; the case goes cold for years until a shocking confession is made.

A teenager's life is turned upside down by a shocking discovery as what seems like a fatal accident reveals itself to be something much more disturbing.

After the brutal murder of a beloved Queens gay man, a community bands together while a detective goes under cover to catch the killers.

Everyone in East Harlem knows Jason Adams and is shocked when his body is found stabbed; detectives are stumped until a tip from an unexpected source points them toward the killer.

When a Costa Rican computer programmer in search of the American Dream appears dead in his bathtub; detectives dive into a complex web of love, betrayal and organized crime, uncovering an unimaginable motive behind his brutal murder.

A Philadelphia DJ is found dead in a radio station parking lot; detectives untangle a web of deceit that proves the old adage that blood is thicker than water.

After the body of a young San Antonio man is found dumped in a local cemetery, investigators retrace the victim's steps to untangle a web of deceit that begins with a heartless woman.

When a body is discovered in the woods, authorities ask if he's the victim of revenge from an ex-girlfriend, her over-protective brother or her 14-year-old son.

A 32-year-old man vanishes in Fort Meyers, Fla., and police quickly link an abandoned, blood soaked vehicle to his case, but investigators must determine if this missing man is a victim or killer.

A North Dakota man dies in the hospital from an apparent heatstroke; when the coroner discovers the cause of death was poisoning, authorities launch a criminal investigation that leads them to a calculating killer with a multi-million-dollar motive.

When a beloved father and driven entrepreneur is fatally shot at a busy California intersection, authorities discover a recent business venture that led one partnership to turn deadly.

A waterfront mansion becomes the scene of a grisly murder when a wealthy businessman and beloved father is found shot to death; investigators explore a promising lead that ceases when access to his digital history reveals the truth behind his demise.

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

A doting grandmother alerts police when she recognizes her daughter's dead body on the evening news, triggering an investigation that proves blood isn't always thicker than water.

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

When a charismatic father and adored member of the local youth sports community is bludgeoned to death, police must discern fact from fiction to pinpoint his murderer.

After skeletal remains are uncovered at a makeshift dumpsite in Fort Sumner, N.M., investigators are left to untangle a complicated family history that reveals the callous truth behind what happened.

A beloved psychologist is found murdered and left in the trunk of a car in the Nevada desert; as the strange case unfolds, police discover he may have been the victim of a model aiming to maintain her lavish lifestyle.

When Texas authorities learn of a murder-for-hire plot against an acclaimed boxer, they must devise an undercover sting operation and race against the clock to save his life and expose the remorseless mastermind.

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.

The investigation into a missing mechanic sends Texas authorities on a wild goose chase that ceases at a dead end, until years later, when a new tip heats this cold case to a boil.

When an elderly woman finds her husband murdered in bed, police race to find the cold-blooded killer.

A successful entrepreneur is found dead on the side of the road; surprise clues are found during the autopsy, and investigators soon uncover a devious sex cult and a masterminded revenge plan that leads them to the one killer no one ever suspected.

Two murders in Toronto ignite an investigation that spans four decades; breakthroughs in investigative genetic genealogy help crack the case.

Two murders in Toronto ignite an investigation that spans four decades; breakthroughs in investigative genetic genealogy help crack the case.

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 the basement of his home; As investigators dig into his personal life, a secret affair reveals a surprising suspect.

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

A massive manhunt ensues after Lois Riess murders her husband in Minnesota and flees to Florida, where she kills and steals the identity of a woman she had just met.

When a prominent Florida optometrist is bludgeoned to death in his home, Melbourne police must investigate claims of self-defense; the evidence trail leads them to a young witness who reveals a wicked murder plot.

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

A troubled woman turns her life around when she moves back home to the family farm; when her elderly mother disappears, police uncover a twisted web of deceit, betrayal and forbidden romance.

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.

After a mother and son are brutally attacked during a home invasion, Illinois police chase down several leads; they uncover a shocking motive with an occult leader and her loyal followers at the center of the crime.

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

A local Washington man's life is at stake when detectives are alerted to a murder for hire plot against him; they set up a sting operation to catch the ruthless mastermind before it's too late.

When authorities discover a young woman's body in a shed, they struggle to determine whether her killer is someone under her own roof or the result of an illicit affair.

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.

A late-night gaming party goes dangerously wrong when a young teenager disappears from the coastal town of Everett, WA.

Three years after a beloved member of a small town goes missing, a torrential storm lets loose a dark family secret.

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 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.

Three years after a beloved member of a small town goes missing, a torrential storm lets loose a dark family secret.

A beautiful Caribbean wedding signals a fresh start for Delaware newlyweds, but when a family feud erupts over their wedding ring, followed by a tragic double murder, police must search for a killer no one saw coming.

A young woman from a religious family leaves home to attend college, where she falls in love with a fellow student; tragedy strikes, prompting investigators to ask whether her rebellion sparked a series of murders to avenge her honor.

The happiness of a second marriage is destroyed after a firefighter is felled by gun violence in front of his own home; his family, police and fellow firefighters search for justice and find out that the killer is someone he trusted with his life.

When a pharmacist is found shot to death in his Wisconsin farmhouse, investigators embark on a 15 year hunt for his elusive killer.

When a pharmacist is found shot to death in his Wisconsin farmhouse, investigators embark on a 15 year hunt for his elusive killer.

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.

While responding to a house fire in New Jersey, firefighters discover the burned remains of the homeowner in the basement; new interviews and legal developments about the latest twists and turns in the case.

When a young pregnant mother goes missing in Virginia, her family embarks on a frantic search, but the case eventually goes cold; years later, investigators speak with a woman who tells a harrowing story and may hold the key to solving the case.

When a Texarkana square dancer is gunned down on the steps of her home, detectives follow a trail of surveillance footage leading straight to the killer.

When a beloved father and driven entrepreneur is fatally shot at a busy California intersection, authorities discover a recent business venture that led one partnership to turn deadly.

A 62-year-old man bails his stepdaughter out of jail for attempted murder and is soon found dead, but investigators learn his death may not be what it seems.

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

When a beloved Wisconsin father disappears, his wife blames drugs, but close friends suspect a violent confrontation that ended a marriage filled with secrets.

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

After a demolition derby driver is found gunned down in his California auto shop, police uncover a dangerous love match that leads one woman to commit the ultimate crime.

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.

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.

A concerned father in Arkansas reports his son missing, launching an investigation that would unearth a dark network of lies and a horrific discovery more deadly than police ever imagined.

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

When a father is found shot to death in his country home, the family immediately accuses the victim's on-again/off-again ex-spouse; however, evidence soon suggests there might be more players to blame than simply a woman scorned.

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

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 beloved town librarian is gunned down, investigators discover that this murder-for-hire gives a whole new meaning to a broken heart.

A small town church is stunned when a parishioner is murdered; in a shocking twist the suspect pool is drawn directly from the church walls.

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

When Fort Lauderdale, Fla., police respond to reports of a deceased male who fell down the stairs, their investigation turns to a homicide case; with multiple witnesses and an attorney on scene, investigators must dig deep to get to the truth.

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

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

After a nurse and mother-of-three is murdered inside her Illinois home, investigators uncover security camera footage that could be key to solving the case.

A beloved Colorado postal worker and father is brutally gunned down on his daily route leaving authorities scrambling to piece together the evidence and find out who would want to execute this well-loved member of their community.

The apparent disappearance of a loving mother and wife seems to be an unsolvable puzzle, until a resolute Ohio detective teams up with an unlikely partner, the woman's heroic 11-year-old son.

Convicted killer Misook Wang sits down to detail her mother-in-law's murder; Wang's ex-lover comes forward to discuss his daughter's death, and why he thinks Wang was involved.

20 years in the making, this special reexamines the Internet's first murder trial, revealing a twisted seductress with a skill for manipulation; after time in prison, she has a second chance at life and love with a stunning final update in her case.

When a young Missouri couple is found shot to death on their front porch, the victims' past quickly reveals several suspects close to home; investigators press for a confession from one of the co-conspirators to expose a master manipulator.

Decades pass before investigators utilize advancing technology to reveal the clown killer who shot a mother in Florida.

At a VA hospital in West Virginia, a string of severe hypoglycemic events results in the deaths of several patients; after an investigation ensues, a pattern reveals the work of a serial killer lurking within the halls of the hospital.

A local Washington man's life is at stake when detectives are alerted to a murder for hire plot against him; they set up a sting operation to catch the ruthless mastermind before it's too late.

After a member of the Indiana cycling community is found mysteriously murdered, medical examiners discover the victim ingested potentially lethal amounts of poisonous mushrooms; Police must work to uncover the culprit behind this bizarre crime.

After returning from several tours of duty abroad, a soldier is found beaten to death on his own army base in Hinesville, Ga; Investigators soon discover the greatest danger may have been waiting for him closer to home.

A Florida woman's search for her missing husband takes a turn when his body is found in a landfill; as detectives dig into his home life, the victim's family becomes a crucial link to uncovering the truth.

A Peruvian healthcare worker gets a second chance at love until he's found murdered in his apartment; investigators set out to discover whether his new bride is a grieving widow or a femme fatale.

A healthcare worker is viciously attacked in her home with only her daughter as a witness; police must follow the clues at the scene to discover the truth behind the attack.

Firefighters are called to the scene of an Iowa family's home to find the residence up in flames; as the smoke clears, they discover the charred remains of a man and question whether the fire and his death were truly accidental.

The fatal shooting of a well-known San Antonio rapper puts the community on high alert as police take part in a manhunt to track down the killer; as they piece together the evidence, witnesses point the finger at a scorned lover fueled by rage.

A woman pursuing her dreams is found drugged in her home; across New York, another person with similar symptoms comes forward, and authorities connect the cases, exposing an international fugitive with a ruthless pattern.

When a businessman is gunned down in his home by a masked assailant, police scramble to figure out who could have wanted him dead; the case leads them on a bloody cross-country trek.

A father in Orange County, Calif. finds a young woman's slain body in his son's apartment and calls the police; he seeks his son and answers; the investigation uncovers an unexpected plot.

A former ballerina shoots her husband in what she alleges was an act of self-defense; the ensuing investigation and dramatic trial spark protests and receives national attention.

A young Tennessee woman mysteriously vanishes and misses her family's Thanksgiving dinner; determined to track her down, her family takes matters into their own hands, pursuing every digital clue she left behind.

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 reveal troubles in her seemingly idyllic life -- and to ultimately unearth her killer.

The murder of Belinda Temple and her unborn baby was Kelly's most contentious case; after years of silence, she sets the record straight about what it took to finally get justice for the victims and their family against an unrelenting defense team.

A deadly crime spree hits rural Kaufman, Texas, taking the lives of two prosecutors; the murders set off fear in the community about who is targeting the protectors of justice; the truth hits much closer to home than expected.

The start of the worldwide COVID-19 pandemic coincides with the disintegration of a once-loving marriage, leading to a cross-country chase to ensnare a vicious murderer.

Two young people are set up by their parents, leading quickly to love and marriage, but it is destroyed by a mother-in-law who orders the killing of a woman in broad daylight.

An aspiring military officer disappears suspiciously from her Virginia home, and two years later, her husband vanishes when he comes under suspicion.

When a devoted husband and father is found shot to death on his bathroom floor, the case is quickly ruled a homicide; a key witness starts changing their story, detectives must determine if this was an act of self-defense or premeditated murder.

A Wild West reenactor is found dead in his private Arizona ranch; police race to find the killer of the beloved showman; as investigators connect the dots, they realize the cold-blooded mastermind is lurking close to home.

When the spouse of a high-profile defense attorney is found dead in their Arkansas home, police theorize if a disgruntled client could be to blame; the investigation exposes an obsessive admirer with a delusional motive to murder.

After a routine welfare check, Albuquerque police discover a beloved teacher has vanished; as investigators dive into her family history, they uncover a shocking murder plot driven by vengeance and jealousy.

After an Oregon wife's failed suicide attempt results in her husband's death, the cracks in a seemingly perfect marriage are brought to light; the investigation uncovers if his inadvertent death is truly an accident or a deadly cover-up.

A Georgia woman who is brutally stabbed provides police with a suspect's name before succumbing to her injuries; as the manhunt for the killer begins, a pattern of toxicity exposes a violent past and more than one murder.

An armored car robbery and Santa Claus bandit captivate headlines, and the crime goes unsolved for years until a local man is found buried in the snow.

A man stumbles on a body in a neighbor's garage and Detroit police hope the victim's tattoo will help identify the victim and point them toward the killer.

Three years after a beloved member of a small town goes missing, a torrential storm lets loose a dark family secret.

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

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

As notorious serial killer Ted Bundy awaited execution, he exchanged chilling letters with the woman he loved like a sister; now she finally reveals the untold story of the letters, and her harrowing journey with the man she discovered was a monster.

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

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

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

After 27-year-old Jonathan Crews dies mysteriously in his Texas apartment, his family takes matters into their own hands in an effort to find answers.

The discovery of a young woman's body in an abandoned building in rural Texas sparks a multi-state investigation lasting nearly two decades.

A quiet North Dakota college town is left in fear after student Mindy Morgenstern is found murdered in her off-campus apartment.

The investigation into the mysterious disappearance of a Canadian man sparks an international manhunt for an elusive killer with multiple false identities.

A week before a wealthy banker's divorce was set to reach a settlement, an ex-con says he was hired to murder someone in the family.

Chilling details come to light in an alleged murder-for-hire plot targeting a former NYC police officer's husband. The officer's ex-boyfriend and other insiders close to the case speak out in their first TV interviews.

A massive manhunt ensues after Lois Riess murders her husband in Minnesota and flees to Florida, where she kills and steals the identity of a woman she had just met.

Decades after Susan Smith confessed to drowning her two small sons in South Carolina, she advocates for parole. Her ex-husband speaks out, arguing that Susan should remain behind bars for the notorious murder of their children.

After college student Angie Samota was stabbed to death, police had no shortage of suspects; a crucial clue narrowed their list to one name, but it would be years before technology and a tenacious friend came together to help unravel this mystery.

Decades after Susan Smith confessed to drowning her two small sons in South Carolina, she advocates for parole. Her ex-husband speaks out, arguing that Susan should remain behind bars for the notorious murder of their children.

The long-lost confession tapes of the man who claimed to be the Boston Strangler have been uncovered. Suppressed for decades, these exclusive tapes reignite doubts about his confession, inspiring experts to reexamine the evidence and suspects.

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

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

A Tennessee resident is murdered in her bedroom; investigators have little evidence and struggle to find answers.

Talented performer Jennifer Stahl and four friends are discovered shot execution-style above New York's iconic Carnegie Deli in the theater district; when the news breaks, the entire city fears there's a cold-blooded killer on the loose.

A mass shooting in Chelsea leaves one dead and three injured; the detective discovers this is the latest in a series of murders spanning multiple precincts; investigators find themselves plunged into the underground world of New York's bouncers.

The tragic suicide of a grandfather seems to be an open-and-shut case until detectives in Morrisdale, Pa., receive a message from beyond the grave that suggests the deceased may not have died by his own hand.

When a former Penn State professor mysteriously goes missing, police uncover clues to his untimely demise; the investigation leads to a grisly crime scene and two unlikely culprits, who would stop at nothing to get rid of him.

A young woman seeks refuge at the home of a Wisconsin farmer, claiming she just escaped from a violent assault; when investigators arrive at the crime scene, they make a discovery that leads them to expose a deadly love triangle.

A loving father and veteran suddenly vanishes in coastal South Carolina; investigators question those close to him and find the unraveling threads of a love triangle; when his body surfaces in a nearby river, a crime of passion comes to light.

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

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

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

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

Kelly and Steve head to his home state to unravel the murder of a recently married Navy veteran, shot execution-style in his lakeside home; an examination of phone records could hold the key to uncovering his killer's identity.

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

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

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

An 18-year-old college student is found stabbed to death in her bedroom; Blayne Alexander revisits this case where a TV show influences the investigation.

When the body of an Ohio woman is found in a wooded area near her home months after she went missing, investigators must determine if her death was a suicide or homicide; the case and trial left Dennis Murphy hungry to know more.

Andrea Canning reflects on a story that reminded her how people can be vulernable and how quickly life can change; she speaks with Judge Esther Salas about the knock at her door that robbed her of the most important thing in her life.

He is the serial killer you've never heard of ... until now. In 1973, 22-year-old Doug Gretzler embarked on a cross-country road trip that spiraled into a brutal killing spree. In just three weeks, he and his accomplice, 28-year-old Willie Steelman, murdered 17 people. Their motive? A mystery that has left family members, law enforcement and experts baffled for decades. Drawing from first person interviews and over 500 hours of recorded conversations with Gretzler himself, hear his darkest confessions and the chilling psychology behind his crimes for the very first time.

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

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

A woman's death is initially ruled a suicide, but when a new investigation begins, police begin to suspect murder.

The body of insurance salesman Brian Davis is found alongside a bayou in Calcasieu Parish, La.; police discover that Davis had many secrets, and those closest to him may be involved in the death.

A Naval officer who rose through the ranks and once questioned terrorists at Guantanamo Bay is found by his wife, dead inside a Florida hotel room.

A wife claims she woke up to discover her husband had been shot to death as she slept next to him; police question if she is a shocked and grieving widow or if she's a cunning killer with a twisted master plan.

When a North Carolina preacher's wife is found murdered, police must determine not only who may have wanted her dead, but whether some members of the congregation are mourning -- or trying to cover up their part in the violent crime.

A family of rodeo queens is thrown into turmoil when their patriarch disappears from his Dalhart, Texas ranch; investigators search for the missing father, they expose family secrets that may lead to a murder plot.

The sister of a successful Hollywood producer is found dead in the garage of a home they share; with conflicting clues at the scene, authorities are left to determineif the cause of death is a tragic accident, suicide or a malicious plan.

After an avid outdoorsman dies from an apparent suicide, South Carolina investigators must unravel a murky story of mental health struggles and a complicated marriage that led to his death.

A grandmother is reported missing in Virginia weeks before her burned body is found in another state's woods; police navigate family tensions to uncover the truth behind her murder.

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

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

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

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

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