Colorado Cop Killer; Playboy Con Man; Larry's Rampage; Life After Lightning; Mickey Thompson; Missing Gringo.

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The arrest of two brothers in the murders of four women.

A woman storms out of a restaurant after an argument with her husband and is never seen alive again.

In 1987, the body of a 17-year-old girl is found face down on a rural road; she had been raped and strangled.

In 1988, an 8-year-old girl goes missing; three days later, the girl's body is found in a ditch.

A low-level offender increases his sentence from 18 months to 16-and-a-half years after three separate counts of aggravated battery on an officer; the same inmate was banned from even non-contact visits after an affair with a prison staff nurse.

The Penitentiary of New Mexico houses both low level and max-security inmates; Level 6 inmates like Chris Shiverdecker, who has a Macgyver-like prison reputation, are still eligible for hearings that could change custody level and security status.

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Learn what's behind mental decline with age, and how to improve memory, focus and concentration with NeuroQ's Darrin Peterson and Dale Bredesen MD.

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A woman in California is violently murdered in her home.

Two decades after the murder of a woman police are led to a small, overlooked piece of evidence that points directly to the killer.

Husband is shot while hunting; wife says she accidentally mistook him for a bear, but police learn the marriage was less than perfect.

Insight into Border Line Murder; Sleepwalking; Searcher's Son; Frightened Family; Dennis Keith Smith.

Bonnie and Clyde 2001; Update: Florida Crime Spree; Storm in Hell; Heather Tallchief; Film Student's Death; Bloodhounds.

Massachusetts Marine; Yeti; Terrorized Teen; Biker and the Vet; Killer Boyfriend.

Texas Crime Spree; Inside Frontera; Deadly Doses; The Entity.

Missing on a Cruise; Taunting Bank Robber; DEA Agent Death; Bullock's Deadwood; Up in Smoke; Danny and His Dad.

John Sutton and his wife Susan are brutally attacked in their million dollar Florida home, but the motive is unknown.

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

A man who was arrested and tried three times for the death of his wife of four months talks about the case.

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

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Paid programming.

A low-level offender increases his sentence from 18 months to 16-and-a-half years after three separate counts of aggravated battery on an officer; the same inmate was banned from even non-contact visits after an affair with a prison staff nurse.

In 1963, a man fishing finds the body of a toddler who had been wrapped in blankets and weighed down by iron molds; it takes 57 years to learn the child's name.

In 1987, a man finds his wife brutally murdered on the kitchen floor.

In 2001, a 7-year-old girl is sexually assaulted on her way to school.

Inmates who become disruptive at the Penitentiary of New Mexico are transferred to the lock-up units in level 5 or 6; the trouble is, their behavior doesn't always improve; this is a lesson rookie officer Amy Lee is learning the hard way.

Prison officials initiate a shakedown after gang members in Level 6 overpower an officer in the recreation area, take her keys and stab a rival gang member; this type of incident simply adds to the tension already felt in the supermax facility.

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When Bonnie Craig was found dead, police collected DNA, but it didn't match anyone in the system; 12 years later there is a hit, but the man is thousands of miles away and, as it turns out, prosecutors need more than DNA to convict a killer.

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

When a California housewife is murdered in broad daylight, the suspected killer claims it was a burglary gone awry.

Mrs. Rogers; Plateau Vision; Update: War of the Depues; Killer Boyfriend; Medford Millions; Looking for Christopher.

Skull Duggery; Lucky School; Deadly Doses; Drug Playboy; Eleven Million Dollar Heist; Fallen Star.

Cases include Dial's Escape; Socorro Close Encounter; Martin Luther King: Part 1 and Part 2; Purvis Confession.

Where's Charlotte?; MP Death: Part 1 and 2; Love on the Run; G.I. Dad; Nazca Lines.

Freshwater Runs Still; Is Ed Dead?; Lake Wales Haunting; Anchors Away; Update: Mental Daze; St. Louis Custody Killer.

Motivational speaker Rebecca Musser talks about her life in The Fundamentalist Church of Jesus Christ of Latter-day Saints and what made her leave the denomination.

Rocky Mountain National Park rangers question whether a woman's fatal fall was an accident or the result of an act of violence.

Lester Holt spends two nights locked up and embedded inside the largest maximum security prison in America, the notorious Louisiana State Penitentiary, also known as Angola.

The arrest of two brothers in the murders of four women.

At the Penitentiary of New Mexico, officers are outnumbered and the inmates are unpredictable, especially in Level 6, the maximum-security facility; it's where the deputy warden says "the worst of the worst" are housed.

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.

Paid programming.

Paid programming.

Inmates who become disruptive at the Penitentiary of New Mexico are transferred to the lock-up units in level 5 or 6; the trouble is, their behavior doesn't always improve; this is a lesson rookie officer Amy Lee is learning the hard way.

In 1974, a 17-year-old girl is found murdered inside a culvert.

In 1979, a 16-year-old girl is last seen alive at Dairy Queen in Las Vegas.

In 1981, a mother of two is found murdered in her home in Florida.

For some inmates, the only way out of prison is "paroling legit," or leaving in a body bag; others earn a lump sum of good time by completing programs or holding a prison job, while a few will take any chance to try to escape.

As the oldest prison in California, San Quentin is steeped in a violent history, so it has a set of regulations and procedures to maintain order; inmates often operate under a different code of conduct; gangs control "prison politics."

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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.

Insights into the story of the private royal, including a look at Diana's troubled marriage, her turbulent life in the royal family and the investigation into her death.

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.

The mystery surrounding the deaths of three women deep in the Sonoran desert takes 17 years to untangle.

Real estate developer Gary Triano lived large and when he was murdered there were whispers of a mob connection, an angry investor, or a mad ex, but the mystery took nearly two decades to unravel.

When a mother of three is found dead a mile from her home, the investigation leads to an unlikely suspect.

A woman sees a mysterious and deeply unsettling occurrence in her neighbor's yard; she wonders if it was an accident, but the truth will prove to be divisive.

A low-level offender increases his sentence from 18 months to 16-and-a-half years after three separate counts of aggravated battery on an officer; the same inmate was banned from even non-contact visits after an affair with a prison staff nurse.

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.

Key players in the case of Rod Covlin, a New York man who is found guilty of murdering his wife for her $5.3 million fortune and attempting to frame his then-teenage daughter, share their stories.

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Paid programming.

For some inmates, the only way out of prison is "paroling legit," or leaving in a body bag; others earn a lump sum of good time by completing programs or holding a prison job, while a few will take any chance to try to escape.

In 1983, 22-year-old Diana Hanson leaves her family's home for a jog and is never seen alive again.

A woman is found dead inside a cemetery in 1996.

In 1960, the police and community are heartbroken by the murder of a little girl.

Boredom reigns supreme for prisoners who spend endless hours, days and months confined to their cells; some have devised creative ways to pass the time; one inmate is creating a wall mural, but not with real art supplies.

San Quentin's warden says that other than an inmate's release date, visits are the most important things in their lives; for some, visits are rare moments of intimacy; for others, they are business transaction opportunities.

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Paid programming.

Paid programming.

Paid programming.

The discovery of a 19-year-old's car abandoned on a bridge in New Jersey turns into a homicide investigation; police discover a plot involving money, close friends and a betrayal.

When a complicated Texas love triangle ends in murder, a pink gun leads to an arrest, until new evidence prompts investigators to rethink the case.

When a model and up-and-coming YouTube celebrity turns up dead, police question her husband in the hope he can shed some light on the situation.

In the California mountains, a young father calls 911 to report that he had been in a shoot-out with a car full of strangers; authorities wonder if it was self-defense or something else.

The children of an Oklahoma pastor survive the robbery that took their parents' lives and observe the trials of those accused of committing the crime.

Mrs. Rogers; Plateau Vision; Update: War of the Depues; Killer Boyfriend; Medford Millions; Looking for Christopher.

Skull Duggery; Lucky School; Deadly Doses; Drug Playboy; Eleven Million Dollar Heist; Fallen Star.

Cases include Dial's Escape; Socorro Close Encounter; Martin Luther King: Part 1 and Part 2; Purvis Confession.

Where's Charlotte?; MP Death: Part 1 and 2; Love on the Run; G.I. Dad; Nazca Lines.

Freshwater Runs Still; Is Ed Dead?; Lake Wales Haunting; Anchors Away; Update: Mental Daze; St. Louis Custody Killer.

Paid programming.

Paid programming.

Boredom reigns supreme for prisoners who spend endless hours, days and months confined to their cells; some have devised creative ways to pass the time; one inmate is creating a wall mural, but not with real art supplies.

In 1981, police are shocked by the violent murder of a 35-year-old woman inside her home in an affluent town.

The body of a young woman is discovered the day after Valentine's Day in 1991.

When two children are murdered in 1986 in Tacoma, Wash., panic spreads throughout the community.

Inside San Quentin, gangs, drugs and sheer boredom make up a violent mix; Scanvinski Hymes has been in prison since he was 18 years old; almost 20 years later, he's racked up the highest number of violent offenses in California prison history.

At San Quentin, every inmate is marked with a security level based on his crime and prison behavior; serving as a reception center, the overpopulated prison must house a dangerous mix of levels within close proximity of one another.

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Paid programming.

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

When a University of Utah athlete is found murdered on campus, investigators learn that she had reached out to the campus police for help multiple times before her death.

A fatal car crash leaves two dead and one seriously injured; it may have not been an accident.

Waag the Dog; Hudson Valley UFO (Parts 1 and 2); Update: Wandering Fisherman; Newlywed Found Dead; Murder 101.

Til Death Do Us Part; Shroud of Turin; Is Borton Back: Part 1 and 2; Burning Bed; G.I. Dad.

Where's Jo?; Mexico UFO; Update: Nudist Fraud; Carlucci; Merchant Student Drowning; Mandy and Punky.

Motorcycle Mom & UD; Update: Ready Teller Robbery; White Bird; Strychnine Death; Missing Mariners.

Slain Sammy; Jumping Off Place; Unicorn's Secret; Update: Bad Chief; Gettysburg Ghosts; Hospital Escape.

When a young woman is found nearly murdered in her apartment, officials wonder if it is connected to the disappearance of a young woman in nearby Denver weeks earlier.

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.

Money and greed tear two close-knit California families apart.

When a California nursing student disappears during her hospital shift, her family works to locate her.

Paid programming.

Paid programming.

Inside San Quentin, gangs, drugs and sheer boredom make up a violent mix; Scanvinski Hymes has been in prison since he was 18 years old; almost 20 years later, he's racked up the highest number of violent offenses in California prison history.

When a Naval recruit is found murdered, a decades-long mystery reveals the identity of the killer.

Police work for 52 years to find the killer who murdered a woman in1969.

In 1989, a Las Vegas teenager on her way to school is never seen alive again.

Using inmates to turn troubled teens away from a life of crime; inmates express their regrets.

In prison, as on the outside, a single decision can change a person's life forever; inmates make all kinds of fateful choices, but behind bars, there is no escaping the consequences of one's actions.

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Paid programming.

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A mother of two mysteriously dies in a minor fender bender and investigators learn that her marriage is what should be investigated not the accident.

After Kristen Grindley is found severely beaten on a road in Pullman, Wash., the investigation is hampered by the fact she cannot remember a single detail about the night in question.

Two suspects are arrested for the murder of a millionaire 15 years after the crime was committed.

Dinnertime Bandit; Texas Most Wanted; Elevator Murder; CIA Coverup; General Wayne Inn; Missing Bird People.

Armored Car Killings; Update: Fumbles Robber; Dahlia/Torso Connection; Tunnel of Cocaine; Black Hope Curse (Parts 1 & 2).

An in-depth look at a series of unsolved mysteries including Casino Cowboy, Update: KC Blast, Road Rage, Australian UFO, San Marino Bones, and Psychic Spy.

D.B. Cooper (Parts 1 & 2); Richard's Rampage; Update: Log Cabin Fraud; Chair of Death; Wood I Lie to You.

An in-depth look at a series of unsolved mysteries including Burnt Evidence, Dark Dante, Skeleton Canyon, Con-Doc, Smitty, and Update: Newlywed Escape.

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

A murder on Valentine's Day leads to a trial with unexpected twists and turns and a surprise ending.

A young art student from Texas is found murdered in her bed with no sign of forced entry, indicating that she knew her killer.

When a California housewife is murdered in broad daylight, the suspected killer claims it was a burglary gone awry.

Paid programming.

Paid programming.

Using inmates to turn troubled teens away from a life of crime; inmates express their regrets.

Police work to identify the perpetrator of a brutal 1985 murder.

A young woman is found murdered in 1987.

A town in Washington lives in fear after a 17-year-old girl is abducted and raped without a suspect in sight.

For some, prison might be hell, and it can be even worse for the sex offenders.

A female inmate finds romance with an alleged gang leader and the jailhouse prepares for a wedding; a very powerful inmate must make a choice between his crime family and his real family.

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Paid programming.

Join Cindy Crawford as she talks to real customers about the breakthrough skincare system that keeps them looking their best. Take a trip to the stunning French countryside to see the rare French melon that defies the aging process.

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A father is murdered in his bed, in the middle of the night; it seems strange to investigators that no one else in the house is hurt, including his new wife who was sleeping by his side; there are three witnesses in the house but no one sees a thing.

Investigators are suspicious when a wealthy former radio DJ mysteriously disappears from his yacht in the Pacific Ocean.

It was a bone-chilling snowy night when mother and professional dancer Stephanie Bruner went missing in the Colorado mountains. Police had three viable suspects in mind, but a complicated love triangle may have sealed her fate.

An in-depth look at a series of unsolved mysteries including Boston Strangler, Gas Station Video, Interceptions, and Model A Sister.

Explores the cases of Sonny Liston, Thumbs, Belgian UFO, Update: Mickey Thompson, and Down to the Wire.

Murder & Extortion; Casino Disappearance; Suddenly Psychic; Larry's Rampage; Update: Trucker Rapist Escape; Plummer's Booty.

Salem Secrets; Update: Pierre's Amnesia; Florida Crime Spree; Ness; Canadian Camper; Rock of Fortune.

Who Killed Superman?; Satchel Bandit; Ghostbusters; Update: Til Death Do Us Part; Money From Heaven; Hot Jock.

Waag the Dog; Hudson Valley UFO (Parts 1 and 2); Update: Wandering Fisherman; Newlywed Found Dead; Murder 101.

Did Jennifer Corbin's desire to spend one last Christmas with her family lead to her murder?

After arguing with her new husband, Lisa Solomon leaves her home and vanishes into the cold night.

Could a killer's resentment of his family enjoying Thanksgiving together have lead to their murder?

Avis Banks is found dead in her garage; police suspect that her fiance may not be all that he seems.

Toronto police are on the hunt for a serial killer who likes to dress up as Santa.

Police respond to a strange 9-1-1 call; inside the home, they find seven people dead.

Paid programming.

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For some, prison might be hell, and it can be even worse for the sex offenders.

For six decades, police work to identify the person who murdered a 9-year-old girl.

Police spend decades trying to identify a baby whose body was discovered in 1982.

Police work to identify the perpetrator of a brutal murder from 1980.

Welcome to Limon Correctional Facility, a level 4 prison that houses many of Colorado's most dangerous inmates; while visiting Limon Correctional, the Lockup crew is greeted by angry inmates and the cell extraction team is called in to help.

When Travis Trani took charge in 2008 he oversaw the implementation of several new policies; the restrictions on movement were among the toughest; inmates from the six different housing units could no longer freely move throughout the prison.

At Oak Street Health, our doctors take the time to get to know you and your needs. We can help you get the most out of your Medicare coverage, set up mail-order prescriptions, and coordinate healthcare & social services. VISITOAKSTREETHEALTH.COM.

Learn what's behind mental decline with age, and how to improve memory, focus and concentration with NeuroQ's Darrin Peterson and Dale Bredesen MD.

Paid programming.

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

Two sisters determined to fulfill a promise investigate the mystery surrounding their mother's death.

A verdict is given in the case of a woman found murdered just three months after being married.

Bones Knows; Update: Model's Third Notebook; Thrill Killer; Noah's Ark; Bad Friday; Ghosts Go to Court.

Tommy and His Parents; Pet Heroes; Update: Cop Killer Escape; Hell's Angels Fugitive; Death Row Mom (Parts 1 and 2).

Green River Killer + UD; Update: Poison Shake; Matchmaker Ghost; Police Captain's Death; Lenny Dirickson; Dead Ringer + UD.

A look at a series "Unsolved Mysteries" including Reincarnated Submariner, Wanted Weaver, Update: Smitty, Oliver, A Manpanzee and Caruana.

Don's Near Miss; Lost in Jamaica; Dutch Schultz Treasure; Voodoo; Update: Stamper's Rampage; Burned Businessman.

A mother of three married to a missionary is found dead on Valentine's Day; the investigation into the murder reveals answers close to home.

After a tech millionaire's neighbor is found murdered, he goes on the run and plays a high-stakes game of hide-and-seek with the authorities and the press.

The murder of a California mother beloved by four men reopens a mystery surrounding another young woman's death that occurred decades earlier.

The disappearance of a 20-year-old honors student causes her family to fear the worst; decades later, the mystery is solved.

Paid programming.

Paid programming.

Welcome to Limon Correctional Facility, a level 4 prison that houses many of Colorado's most dangerous inmates; while visiting Limon Correctional, the Lockup crew is greeted by angry inmates and the cell extraction team is called in to help.

For 15 years, northern California is haunted by a serial rapist until genetic genealogy finally reveals the identity of the elusive sexual predator.

In 1976, a 16-year-old girl is found murdered near a roadside ditch in the small town of Walton, Ky.

Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.

Paid programming.

Paid programming.

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Before he vanishes, Larry McNabney has a thriving career and a wife he adores; the mystery that unfolds is as twisted as they come; it involves a love triangle and an individual who is hiding a secret identity.

A cold-case investigator helps police determine what happened to a missing woman.

Detectives find a message written in blood during a murder investigation.

Bermuda Triangle; Campus calamity; Car crash thank you; Breakout mom; Healing touch.

Witch hunt; The other intern; Victorio's gold; Phantom judge.

War of the Depues; Update: Gypsy Fraud; Armando Garcia; Big Foot; Payback Killer; Florida Flim Flam + UD.

Con Artist Cop; Astarte; Mystery Hitchhiker; Holy Grail; Update: Carlucci; Train Wreck Amnesia.

Suspicious Suicide; RFK Pix; Without a Song; Grace's Ghost; Update: If the Truth Be Known; Vampire Kids.

After shedding hundreds of pounds, a popular kindergarten teacher goes missing; investigators find a link between her weight loss and her disappearance.

On the night after Christmas, Craig Nail and his girlfriend Therisa are attacked inside his home.

Scott Dell is found dead inside his home; at first, it looks like suicide, but police are not so convinced.

When a Hasidic businessman's half-burnt body shows up in a dumpster, Brooklyn police face a holiday whodunit.

A husband and wife are shot, leaving one dead; is it a burglary or something more sinister?

When Corey Parker is found stabbed to death, a nationwide hunt ensues to track down her killer.

When Carmen Sanders is found stabbed to death with a knife lodged in her chest, detectives investigate.

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Paid programming.

In 2003, the skeletal remains of a young woman are found.

The identity of Nancy Bennallack's murderer is a mystery until the advent of investigative genetic genealogy.

Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.

Even for inmates serving hard time, love can be a strong motivator; in prison, reaching out to others can be a dicey proposition; some inmates just don't know when someone's getting too close until it's too late.

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A man from Iowa is shot to death while sleeping in bed next to his fiancee; coincidences and quick thinking lead to surprising information regarding the killer's motive.

A man convicted of murdering a woman in her upscale Austin, Texas, home tells his story for the first time.

The residents of a glamorous resort town are shocked when a well-known woman from a prominent family is found dead in her home.

The disappearance of 19-year-old Alaska Native Sonya Ivanoff sends shockwaves through the small coastal city of Nome, Alaska; police scramble to find answers until a note is found in a stolen police vehicle telling the cops to back off or else.

A family visit over the holidays ends in tragedy when a man is found dead on the kitchen floor; authorities are faced with twists and turns in the case as new details emerge.