An arrest is finally made five years after a mother of four disappeared while she was close to her apartment in Montana.

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.

When a woman returns two days after being reported abducted, authorities believe it's a hoax until a similar crime forces them to take another look; twenty-seven women who have accused Bill Cosby of assault get together to share their stories.

Twenty-seven women who have accused Bill Cosby of assault get together to share their stories.

Ten years after a 16-year-old boy confessed to a double murder and was sentenced to life in prison, a local businessman tries to prove the confession was coerced and the teen was wrongfully convicted.

The case of Johnny Hincapie, whose conviction for the 1990 murder of a Utah tourist in New York -- a case that represented a tipping point in the city's law enforcement -- was overturned after 25 years.

Iowa, 2013: Carrie Elaine Olson goes missing and the current boyfriend and ex-boyfriend are suspects. Circumstantial evidence starts mounting and pointing to one suspect.

Natalie Morales speaks to the mother of the teenage sexual assault victim from St. Paul's School; new details from both sides of the case, Owen Labrie's conviction and sentencing, and interviews with Labrie's friends and legal team.

When detectives track down the killer of a Las Vegas cocktail waitress and mother, it becomes clear that the investigation has just begun.

A model with a checkered past goes under cover to reveal the truth about a cold case involving a romantic getaway on a boat that ended with a woman being lost at sea.

A tale of obsession, revenge and unrequited love is revealed when police investigate the murder of a doctor who is found dead in his Texas home.

The five-year investigation into the death of a retired corrections officer, who was killed by antifreeze poisoning, reveals multiple suspects.

When a graduate student is shot dead outside of her North Carolina home, a 911 caller leads detectives to believe the victim's fiance is the key to solving the case.

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

Rachel Buffett, whose former fiance, Daniel Wozniak, was convicted of two grisly murders, talks about being at the center of the investigation.

Stacy and Jason Bingham discuss their five children's health issues as one child undergoes a second heart transplant and another child's heart begins to fail.

Stories from the people who were egregiously harmed by the actions of Michigan oncologist Farid Fata, who pleaded guilty to fraud, conspiracy and money laundering; how Fata's lies were exposed.

The 2015 retrial of Russell Faria, who was convicted years earlier for murdering his wife, reveals surprising new allegations

Now exonerated, Eric Glisson discusses the 18 years he spent in prison for a murder he did not commit.

The controversial conviction of Steven Avery -- who was previously exonerated after spending 18 years in prison for a sexual assault he did not commit -- in the murder case of Teresa Halbach.

A thump heard by the children in a Carlsbad, Calif., home one summer morning is the first clue in a shocking mystery involving family secrets.

The investigation into the death of a Florida firefighter reveals a tale of secrets, lies and infidelity.

Detectives suspect an inside job when a coin collector and his wife are found dead in their home with no sign of forced entry or evidence of theft.

When 21 year old student Jamie Hart is found murdered along a Texas road , detectives begin the hunt for her killer.

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

The mystery of a Florida hotel owner's disappearance confounds family, friends and the detectives investigating the case.

The drug-related death of a 17-year-old girl sheds light on a new class of synthetic drugs that has law enforcement agencies on alert.

Prosecutor Marcia Clark reveals details about the trial of O.J. Simpson; interviews include Kris Jenner, Denise Brown, Fred Goldman, Kim Goldman, Kato Kaelin, Skip Junis, and Bob Costas.

In an all-new two-hour Dateline, Andrea Canning tells the story of a woman who falls to her death while hiking with her husband in Rocky Mountain National Park. Rangers question if her death was an accident or a heinous act of violence. Will a buried secret soon be revealed? Airs Friday, February 26 at a special time 9p/8c.

When a couple in rural South Carolina is brutally murdered in their home, the investigation into who committed this heinous act tears a family apart. Dennis Murphy reports.

An Army captain, back from serving abroad, is found dead in her El Paso home. The news stuns her tight-knit military community. Her husband has an alibi, but what about her family and friends? Andrea Canning reports on a case with many twists and turns.

Keith Morrison reports on a Chicago woman from a large family missing for several days. As the whole city joins in the search, detectives begin to suspect that a man in her life has many secrets.

A wife reports a prowler and shots fired in her backyard. Her husband, an Olympic bronze medalist, is dead. Was it murder, or an act of self-defense? Keith Morrison reports.

Before time runs out, detectives race to find a Little Rock, Ark., realtor who went missing after showing a house.

Dennis Murphy reports on a house fire that breaks out in the middle of the night in Kentucky. When Julie Griffith is found dead amongst the rubble, investigators soon discover the fire was anything but an accident. Keith Morrison reports.

After a sudden marriage creates tension between two families, a murder exposes secrets, lies and a long-buried mystery.

Detectives race to find a Little Rock, Ark., realtor who went missing after showing a house.

A Cornell student and star athlete gets caught in the middle of a homicide investigation.

A hairdresser-turned-detective uncovers the truth behind the murder of a teenage girl in Utah.

The security cameras at a woman's home may hold the key to solving the mystery of her disappearance.

Police in a small Texas town believe a man may be behind the shooting deaths of his wife and her son in their home

A woman's story about an abduction and murder helps reopen a decades-old case that has weighed heavy on a New York town.

Four years after a 28-year-year old's death, a jury must decide if it was suicide or murder.

When a woman is found dead inside her Jacksonville Beach apartment, police hope they’ll quickly find her killer. Instead, it takes more than a year to solve their case. Andrea Canning reports.

A man dies in a shooting incident after tempers flare in a confrontation in Montana's Glacier National Park.

The family of a young woman found dead in the Montana wilderness spends decades in pursuit of justice. Keith Morrison reports.

Martha Moxley is murdered in 1975 after attending a party at the Skakel home, relatives of the famous Kennedy political family. Examines Michael's 2002 conviction and 2013 release and alternate proposed suspects

Crimes committed by Charles Manson and his followers in 1969.

The investigation into a newlywed's disappearance focuses on her job as a CIA employee as a possible clue.

People involved in the investigation of the 1996 murder of 6-year-old JonBenét Ramsey discuss the case; case documents made public for the first time; footage of the police interview with JonBenét's brother.

California, 2011: Chris Northam Sr. was shot twice in the warehouse of his business. The suspect list is large and includes angry investors, disgruntled employees and ex-lovers. The case stalls. Then someone comes forward with a bombshell.

A former hairdresser who became a police detective takes the death of a 15 year old girl whose body was found on a scenic Utah river personal, working the case for years and in honor of a fallen fellow officer.