The first in the series aired in November 2004 as a Dateline NBC segment called Dangerous Web. The operation was set up in a home in Long Island, NY, to which 18 men came over two-and-a-half days after making an appointment for sex with a minor. One of the men in the investigation was a New York City firefighter, who was later fired by the FDNY.

A look at Apollo 13 through the perspectives of the Astronauts

Pro baseball player Alex Rodriguez. An update on conditions at fast-food restaurants.

This report aired Dateline Friday, Feb. 3, 9 p.m. We want to warn you some of what you'll see is explicit. But parents need to know what their kids can confront when they sit down at the computer.

Predators scouring the Internet, targeting children for sex: It's a national problem that Dateline has helped uncover. We got such an overwhelming response from our last investigation— some 15,000 emails from parents, grandparents, teachers and law enforcement— telling us to "keep up the good work," and "keep the issue alive." On Wednesday night, April 26, Dateline is back with the fourth undercover investigation. This time, we traveled to small town America. Even far from the big cities and suburbs, vulnerable young teens are not far from danger. A warning: some of what you're about to see is explicit.

This report aired May 10, Wednesday, 9 p.m. An encore presentation airs May 31, 9 p.m.: It's the latest in Dateline's month-long series of undercover investigations— children at risk from grown men online. This time, we take our hidden cameras to Florida. We thought we'd seen and heard just about everything, but what we found there surprised even our own Chris Hansen. A warning: some of what you're about to see is explicit.

This report airs May 17, Wednesday, 9 p.m.: This month, millions of people have been watching our investigations into computer sex predators — among them, some of the suspected predators themselves. And what's most surprising is that even knowing that they may be walking into a sting is not enough to keep some of them away. Tonight, we're back in Florida, where we started our investigation last week. We want to remind you that some of what you'll see and read is explicit.

Like moths to the flame, they just keep coming. It's been more than two years now since we first began our series of reports investigating online sex predators. Five different states... 129 men exposed. On Dateline Wednesday, investigation number six. This time, we've set up our hidden cameras in a rented house in rural Georgia. And once again, even men who've seen our reports show up at the door. We should let you know, some of what you'll see and read below is explicit. This report first aired on NBC, Sept. 13.

In community after community, vulnerable young teenagers are still at risk from grown men online. On Sept. 22, Friday, our hidden cameras are in Georgia. This time among the suspected predators caught on tape are three military men — two served in Iraq. Now they could be serving time in prison. Again, we want to warn you, some of what you'll see is explicit.

A man is accused of killing his beautiful wife on a moonlit beach walk and then shooting himself to cover up the crime, Dennis Murphy reports.

Dateline is in the town of Petaluma, Calif. where two high-profile predator cases made national headlines. What would our hidden cameras find there? Again, we want to warn you that some of what you’re about to see is explicit. This report aired Friday, Sept. 29, and repeats Nov. 11, Saturday.

It's what prompted our entire series of predator investigations: Grown men sending graphic e-mails to young teenagers. And now, it's what has forced a powerful congressman out of office in the scandal that's consuming Washington. Representative Mark Foley of Florida is accused of having sexually explicit online chats with underage teens. Dateline's latest investigation also uncovers some prominent men caught in what police say are criminal acts. They, too, risk losing their jobs... and in some cases, perhaps even their freedom. Again, we want to warn you that some of what you’re about to see is explicit. This report airs Friday, Oct. 6.

Someone, we don't know who, posted an online warning that Dateline's hidden cameras are in the neighborhood. But think that stopped these men? We want to warn you that some of what you’re about to read is explicit. This report aired Tuesday, Jan. 30.

We're back in Long Beach, California, where the long arm of the law has reached out and grabbed more than 3 dozen men in just 3 days. And perhaps the most surprising arrest in our most recent investigation? It didn't happen overnight in our undercover house — it happened in broad daylight, in a public park. We want to warn you that some of what you’re about to see is explicit. This report aired Tuesday, Feb. 6.

More predators caught in Dateline’s phenomenal sting operation.

This report airs Tuesday, Feb. 20 on NBC.

Dateline's cameras are on the beach, and suspected predators are online. We want to warn you that some of what you’re about to see is explicit. This report airs Tuesday, Feb. 27 on NBC.

Dateline continues its investigation in Florida, where over the course of our four-day investigation, 21 suspected predators showed up at Dateline's undercover house on the beach. We want to warn you that some of what you’re about to see is explicit. This report airs Tuesday, March 6 on NBC.

Tonight we follow Chris Hansen behind the scenes of this remarkably popular series. Whether you love it or hate it, it's hard to look away. The personal accounts and some very memorable confrontations are equally riveting in this episode.

Chris Hansen embarks on a new series of investigations that takes him into real danger as he exposes internet cons via emails preying on people believing in promises of money from foreign sources.

Dateline's Chris Hansen goes on an undercover investigation that starts at a computer keyboard and travels across America and the Atlantic.

We’re on the hunt for a new kind of predator: Wendy, the apparent mastermind of an international identity theft ring. So far, the search had taking us taken us clear across the country and it’s about to take us around the world as we track down the crooks who steal your credit card and banking information to go on shopping sprees with your money.

This has to make you wonder if Dateline is the only way anyone is caught doing anything. Tonight, undercover cameras in Houston, Texas and reporter Victoria Corderi not only document the car thefts, but follow the car .

Three separate shootings in Albuquerque, N.M. left five dead.

It's our twelfth "To Catch A Predator" investigation and this time we're set up in a 6,000- square foot home in Bowling Green, Kentucky. It's a town of about 50,000 people an hour north of Nashville, Tennessee. Each one of these investigations has its own rhythm and Kentucky is no different. Within hours I am struck by the fact that fewer men are showing up at our hidden camera house than in past investigations. Looking back I think this at least partially because the Kentucky Attorney General's office and the Kentucky Bureau of Investigation, along with local law enforcement, have been actively pursuing online predators in the past year. Before Dateline's investigation in Bowling Green, the Attorney General's office with the help of the online watchdog group Perverted Justice had conducted two previous sting operations without us, making 20 arrests. One of them was a 59-year old criminal justice instructor at an Ohio college who used to be an elementary school teacher.

A rare look at the frightening power of a charismatic killer, just 18 years old -- a teenage mastermind who convinces other kids to kill.

A Day At The Beach The fascinating Chris Hansen Dateline undercover sting series continues with new episodes. Tonight, in a multimillion dollar home on a beach in New Jersey, predators are still pursuing underage children and Perverted Justice volunteers are still pursuing them.

A millionaire's wife runs off with an electrician, who runs through some of the couple's fortune. When the millionaire winds up dead, guess who the prime suspect is?

No one could figure out why a college student died in her bed - until a tiny spot launched an epic investigation.

A story as old as Romeo and Juliet, but with an unpredictable ending.

An investigative report on the death of a female parishioner inside the office of the county church, which shocked the congregation and left them suspicious to why this happened. Was this death a murder or maybe a suicide? Correspondent Keith Morrison reports.

Correspondent Josh Mankiewicz investigates the case of the 2001 drowning of a woman inside her own bathtub which has seen many twists and turns throughout the years.

Dateline investigates the murder of model and aspiring Playboy Playmate Paula Sladewski who charred body was discovered in a Miami dumpster.

A popular college freshman is gunned down in her car for no apparent reason. Police had no clues: no fingerprints, no information about trouble in Michelle O'Keefe's life. Then an unexpected source comes into the picture.

A teenager and her family stop a string of attacks against women when they stop a killer in his tracks.

Lester Holt reports on youth violence in Chicago and the efforts being made to combat gangs and get guns off the streets.

When a college student commits suicide, her friends and family question the identity of a person she met in a suicide chat room; a man is accused of murdering a former friend.

A husband is found dead in a stable in what appears to be a horse accident. But when bullet casings and a bloody pipe are found nearby, blame shifts to his wife, whose daughter and son accuse her of plotting the murder and convincing her son to commit the crime.

When a college student commits suicide, her friends and family question the identity of a person she met in a suicide chat room; a man is accused of murdering a former friend.

Footage and interviews from coverage in the days following Hurricane Katrina; Brian Williams describes the chaos he witnessed while reporting from New Orleans.

Clerks steal winning lottery numbers from unsuspecting customers and claim the prizes.

Murder suspect Joran Van der Sloot speaks out for the first time since his arrest.

With no arrest having been made years after a real estate agent's murder, frustration continues to mount among her family and friends; detectives connect a series of seemingly random crimes to crack the case of a missing young man.

A circle of friends from a high school in Miami are about to embark on a new beginning, all heading off to college for the first time. But when one is left behind, he surprises them all with a last minute decision. Dennis Murphy reports.

A former NASA chief discusses how he and his 19-year-old son survived a tragic Alaskan plane crash in August 2010; when two Americans go missing in Panama, natives discover the dark side of a fun-loving bartender.

In the season premiere, the disappearance of two California teenage girls is investigated by Keith Morrison.

An Easter Sunday celebration turns tragic when a Nebraska family's parents are murdered. Correspondent Keith Morrison traces the search for justice in the cas

A lawyer is left blind after an intruder breaks into his home and murders his wife; the man, on a search for the truth, questions his troubled son as a potential suspect.

A lawyer is left blind after an intruder breaks into his home and murders his wife; the man, on a search for the truth, questions his troubled son as a potential suspect..

"Blind Justice" Keith Morrison investigates the murder of Susan Sutton and the blinding of her husband John in their Coral Gables, Florida home on August 22, 2004.

"Rescue on the Mountainside" Ann Curry reports on the August 9, 2010 plane crash in Alaska that killed Senator Ted Stevens and the heroic efforts of the crash survivors and rescuers who responded quickly to the crisis."Stealing Paradise" Kate Snow investigates the disappearance and murder of Cher Hughe, a resident on the tropical island Bocas del Toro off the coast of Panama.

Police solve a case of a teenager who disappeared from her friend's house before being found dead; a case of a love triangle involves an Air Force captain, his wife and her lover.

An interview with Mary Winkler, a preacher's wife who was convicted of killing her husband.

New details in the disappearance of 7-year-old Kyron Horman; eyewitnesses describe what they saw the day he went missing; a teenage girl is involved in a murder mystery after her older boyfriend is attacked and dies.

Prince Charles discusses his role as the Prince of Wales, his relationship with his sons, his media image and his attempts to combat global warming.

George Clooney embarks on a fact-finding mission across war-torn Sudan.

The remains of 11 female bodies are found in the desert outside of Albuquerque, N.M.

Previously unknown details of the Elizabeth Smart abduction; investigators fear the case of a murdered businessman may go unsolved despite their continued efforts.

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.

Ann Curry travels to the remote hills of Haiti with a group of American volunteers fighting against the cholera outbreak.

Undercover police operations in Las Vegas.

Investigators track down a suspect in the disappearance of a celebrity dog trainer.

Actor Michael Douglas discusses his battle with cancer; former President George H.W. Bush's foreign policy team; Tucson, Ariz., shooting survivor Suzi Hileman.

The investigation into the deaths of a couple at their Michigan home leads detectives to believe a family member is to blame.

“Written in Blood" Dennis Murphy reports from Michigan on the murder of two parents and the investigation into their son.

Hidden cameras reveal scams including a psychotherapist with a dark secret, fortune tellers and air duct cleaning companies.

“Bringing Brooke Home" Kate Snow reports on the disappearance and murder of Brooke Wilberger.

Aron Ralston, whose climbing-accident story inspired the movie ``127 Hours,'' talks about his life after the incident.

“Inconceivable" Meredith Vieira reports on a mother who discovered she was carrying another couple's embryo.“Internal Affairs" Josh Mankiewicz follows a cold case to its conclusion as the Los Angeles Police Department investigates its own officer for a murder.

A man is fatally poisoned by medication for a disease he didn't have, casting suspicion on his nurse wife.

A top-ranking officer in the Canadian military pleaded guilty to a number of crimes, from home invasions and lingerie theft to murder.

Actress Suzanne Somers speaks with Dr. Nancy Snyderman about alternative cancer treatments.

The rivalry between two teens turns deadly when threats escalate to violence; an Indiana mother is found asphyxiated in her basement gym.

The latest on the family situation of actor Charlie Sheen and his reaction to the media frenzy surrounding his lifestyle and his comments; new home videos reveal intimate details about Charlie, his girlfriends and his home.

Hidden cameras reveal how teens react to different bullying situations.

The tsunami in the Pacific Ocean; when two newlyweds on their honeymoon go diving on the Great Barrier Reef, but only one returns alive, authorities try to determine if it was an accident or murder.

A divorced mother hires someone to kill her ex-husband. Also, a San Diego mother tries to find the murderer of her daughter and and infant grandson.

A collection of people present for the wedding ceremony of Prince Charles and Princess Diana in 1981 look back on the historic event.

A young woman is found severely injured in the middle of the road, but her injuries have robbed her of her memory of what happened to her. Also, a woman kidnapped as a child and raised by her kidnappers searches for her real identity.

A man with a troubled past goes through an intense emotional therapy program.

A popular college freshman is gunned down in her car for no apparent reason. Police had no clues: no fingerprints, no information about trouble in Michelle O'Keefe's life.

Also: a look at actor Charlie Sheen's home life at his estate. Correspondents: Keith Morrison and Jeff Rossen.

Hidden cameras reveal how teens react to different bullying situations.

Dennis Murphy investigates the mysteries surrounding the shooting deaths of two family members in a still Georgia hamlet.

Correspondent Hoda Kotb delves into a four-year international custody battle.

When Amber Dubois vanished in San Diego County, a search turned up nothing. Then, a year later, Chelsea King disappeared in a neighboring town. Tonight, Keith Morrison reports on the mystery of the missing California teens.

Reporter Keith Morrison explores the plight of unwanted children in Moscow, recounting the story of an institutionalized boy whose life took a positive turn after years of rejection.

Rob Stafford investigates the cold-blooded slaying of an expectant mother. In a second report, Keith Morrison tracks the work of a dauntless detective and a determined attorney to solve the cold-case killing of a 21-year-old woman.

Chris Hansen files a report on Mexico's drug war. Hansen joins with Mexican federal officers on a secret assignment to capture kingpins and relates the story of a hit man leading a double life. Also: a woman who sacrificed all to battle corruption.

Dennis Murphy delves into how two brothers were killed under odd conditions but at different times and in separate locations. In addition, Keith Morrison details a family hunting trip in Newfoundland that went terribly wrong.

NBC’s Dennis Murphy traces the journey of Kate Middleton from commoner to Her Royal Highness.

The impact of the recent tornadoes, severe thunderstorms and flash-flood warnings in the United States; reports from London include behind-the-scenes coverage of the royal wedding.

First lady Michelle Obama and Dr. Jill Biden talk about their ``Joining Forces'' campaign, Rep. Gabrielle Giffords' staff discuss the shooting, singer Steven Tyler talks about success and drug addiction, ``Bridesmaids'' cast members.

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

David Goldman, whose five year battle for custody of his son made international news, talks about life since being reunited with his child.

A doctor disappears while on vacation with his wife, leaving her $6 million in debt.

Hidden cameras reveal how quickly, honestly and efficiently repairmen do their jobs.

A young woman teams with a U.S. Marshal to find the man who murdered her mother 18 years earlier.

Chris Hansen visits a shop in New York that sells bath salts, a new designer drug.

Keith Morrison reports the story of an Oklahoma pastor's son and daughter who endure a remarkable road to recovery after witnessing a terrible family tragedy.

Richard Engel reports on the Battle of Wanat, one of the worst casualty counts of the Afghanistan war that left nine soldiers dead and 27 injured the families of one platoon come together to grieve and uncover why their sons died.

A successful young man is shot down in front of his Philadelphia home. A woman finds her way back to her family after being kidnapped 30 years earlier.

The citizens of a Wisconsin town come together to renovate a family's home.

Hidden cameras reveal how teens react to different bullying situations.

Josh Mankiewicz probes the cold-case murder of a casino-sales executive.

New details and courtroom dramas key Dennis Murphy's update on the Caylee Anthony case. Anthony's young mother, Casey Anthony, is accused of murdering the toddler in 2008.

When a 38-foot empty Donzi boat is found making circles in the ocean with nobody on board, a mystery begins in the Bahamas. While hundreds of Americans die every year from accidental carbon monoxide, NBC News’ Kate Snow previews one case that police say was not an accident, but potential murder.

Lester Holt takes viewers into Chicago communities, children who grow up quickly and die young.

An Oregon family struggles with the mysterious disappearance of their daughter, and Kate Snow looks into the investigation that plagued family and community.

A year after being taken captive by Somali pirates, Captain Richard Phillips talks with Matt Lauer about his harrowing experience and brave rescue.

A young detective investigates a college student's death; chronicling the events of the Casey Anthony murder trial.

Chris Hansen goes under cover with California lottery investigators; testing the integrity of lottery clerks in New York.

When a woman goes missing in a small town in rural Michigan, her husband becomes the primary suspect. But eyewitnesses and surveillance cameras support his alibi that he was in Virginia the day she disappeared - more than 700 miles away.

A year-long investigation into children migrant workers.

A 24-year-old U.S. citizen targeted by kidnappers in South America and taken; the story of a man who is suspected of murdering his wife in a fire.

Chris Hansen goes face-to-face with a man, who along with other conspirators, cheated a Connecticut woman out of her life savings through an internet scam.

A former homecoming queen comes under suspicion after her husband is found stabbed to death and an affair with the local youth pastor is uncovered.

Brian Williams documents a day behind-the-scenes on Capitol Hill where viewers will get an unprecedented look at life under the U.S. Capitol dome.

An admired sports editor is killed on Halloween night.

Tom Brokaw reports the story of three different families throughout the war in Iraq.

A couple's romantic night at the Hudson Palisades ends in a tragic fall, leaving officials questioning whether or not it was an accident.

The murder of a husband exposes the shocking secret life he had with his wife. They were swingers.

Lester Holt reports the story of three American women who face the Great Recession and their own worst fears.

A young father fights desperately across the United States for custody of his baby girl. Plus the story of Nancy Cooper who went missing while jogging in a suburb of Raleigh, North Carolina.

Watch amazing animals and the true stories behind some of the most popular videos on the web.

A serial killer stalks human prey through America's national forests until clues help trigger a multi-state manhunt.

Former Vice President Dick Cheney discusses his new memoir with Jamie Gangel; Grammy award winner Miranda Lambert is interviewed by Hoda Kotb; 12-year-old author of "Heaven is For Real" sits down with Hoda Kotb to hear about his trip to heaven.

Reports from a desert in New Mexico which has become one of the largest crime scenes in history, where the remains of eleven female bodies were found buried.

When a young woman disappeared in Alaska, police looked at two brothers as suspects. Would anyone be able to breach their loyalty and find the truth?

Tom Brokaw, recaps some of the most powerful stories reported by NBC News in the days and months following the tragic assault on our nation.

An indie film-maker is connected to the case of a missing man, which started as an obsession with "Dexter". Was it a publicity stunt or something far darker?

A young Florida mother abducted at gunpoint and taken for ransom. Three failed attempts to drop the ransom put everyone on edge and no one imagined the bizarre way this crime would be solved.

A troubled marriage, then suddenly a man disappears, leaving behind a daughter and step-son. The truth from a secret kept for over eight years.

A young woman disappears following her chance encounter with a stranger on a train. Her desperate family hires a dream team of detectives to follow the mysterious trail she left behind.

A couple with the perfect marriage until Cristi was found dead in the backyard spa. And, a story-book marriage, NO lust, greed and deceit led to an elaborate murder plot that makes reality TV look like a fairytale.

In October 2009, James Arthur Ray, a renowned self-help author and speaker, held a "Spiritual Warrior" retreat in Sedona, AZ. Three people died during the retreat, and Ray was charged with manslaughter but convicted of a lesser charge.

A couple meets at the craps table in Las Vegas. She was a beautiful trapeze artist and he was a professional poker player -- with a secret. Did he take a gamble that led to murder?

The case against Michael Jackson’s doctor, Conrad Murray, is in the hands of the jury, who will decide whether he played a role in the death of the pop star.

A fatal car crash in Montana may not have been an accident after investigators find a revealing set of text messages.

Tom Foley is shocked to find himself the lead suspect in the case of his wife Darlene's murder. Thinking the case was over, the defense team is soon approached by a stranger with new evidence that would turn everything upside down.

A vacation in Aruba that morphed into a mystery, Robyn Gardner went missing and many presume she's dead.

2 years ago the young mother from Utah vanished. A husband under suspicion, a father-in-law under scrutiny, and investigators under pressure to solve this mystery at last.

10 Years ago, the accusation that Penn State Coach Jerry Sandusky sexually abused a child, came to the attention of Ray Gricar, the local district attorney. 3 years later Gricar went missing. His laptop was found but the hard drive was unreadable. Could Gricar’s disappearance be linked to the Sandusky scandal?

Millen, Georgia, a small industrial town so devastated by the Great Recession, its unemployment numbers peaked at 21% - more than twice the national average.

The story of an unsolved case involving a woman's love triangle that ended in her husband's fatal stabbing in front of their home, but more than two decades later, detectives have re-opened the case and need her help.

In the lead up to a murder trial, it begins to look like police arrested the wrong man.

Investigating the murder of a brilliant professor.

After young father Matthew Podolak dies from antifreeze poisoning, the manner of his death remains undetermined until his brother embarks on a quest for the truth.

Elizabeth Smart talks about her experience of being held captive for nine months when she was 14 years old.

Terrorism is suspected when a woman's truck explodes outside of the daycare center where she works.

A man claims his young wife killed herself after she is found dead in her burning home.

A young father in California calls 911 after being in a shootout in a car full of strangers that injures two people and kills another.

When a young woman's fiance is tragically killed at a bar on Halloween night, the authorities are charged with the difficult task of finding the identity of a killer who has not only disappeared, but was in costume on the night of the incident.

Some of the most incredible, death defying escapes to ever be caught on tape; authorities investigate the mysterious death of a young woman, whose body was found on the streets of Miami a mere four days after her wedding. Dennis Murphy reports.

Authorities investigate the death of a young mother who was found in her own home by her identical twin daughters, in a presumably safe, gated community, leaving behind clues from her past that point to a potential love triangle. Keith Morrison reports.

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

20 years after an attractive young nurse was murdered in her studio apartment, authorities try to piece together what little evidence that remains to solve the cold case, including a necklace that was broken and a strange murder weapon. Keith Morrison reports.

When a well-known woman from a prominent family is found dead in her Aspen, Colo. home, the entire community is left in a state of shock, leaving the authorities wondering who was behind her apparent murder and why they did it. Keith Morrison reports.

While away on business in California, Frank Howard, a high flying accountant from Carrollton, Texas, learns that his wife has been brutally attacked in their home.

A cryptic 911 call made days before a young Army veteran disappears helps detectives uncover the truth, exposing a twisted story of unrequited love Josh Mankiewicz reports..

When young mother and wife from upstate New York mysteriously vanishes, the authorities on the case find some unexpected secrets that leave them wondering if her disappearance is related to her online life, or something much closer.

When two women from the same church are the victims of violent crimes one year apart, the authorities try to determine if there is a connection, and a photo surfaces that leads them to believe the similarities between the case are not coincidental. Keith Morrison reports.

The community of Jonesboro, Arkansas is stunned when a local father and real estate investor is found dead in his own kitchen, leaving the authorities on the case wonder who could have possibly been behind the young man's murder.

When a wife and mother is found dead in a Kentucky warehouse where she worked, detectives soon zero in on one person of interest.

A well known lawyer from a southern town is found brutally murdered, with his girlfriend bound by duct tape, and as the authorities put together a list of potential leads, the primary suspect has a surprising connection to the victim. Andrea Canning reports.

A newly married couple both manage to recover from the same strange illness, but months later, the wife ends up passing away after showing the same symptoms again, leaving the investigators without answers, until some old recordings surface. Dennis Murphy reports.

A woman seeks the truth when her whirlwind romance turns into a mystery involving government agents.

The story of a successful realtor who was attacked and left for dead while showing a home in what looks like a murder-for-hire, and the authorities are left to question his business partners and family to determine a motive. Josh Mankiewicz reports.

A popular kindergarten teacher and mother makes a lifestyle change, losing several hundred pounds, but when mysteriously vanishes from her home, the police suspect her dramatic weight loss could be connected to her disappearance. Keith Morrison reports.

After a mother is murdered in her own bed, the 911 dispatch center fields two calls, one from her son and one from her husband, both of whom claim the other is the killer, telling wildly different stories that the authorities must figure out. Dennis Murphy reports.

German foreign exchange student and soccer player Diren Dede's dreams of studying in America came true when he began his junior year at a Montana high school. But when he decides to play a reckless teenage game, the consequences turn deadly. Josh Mankiewicz reports.

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.

A 29-year-old woman goes missing.

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.

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

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

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.

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

A man who was recently acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story; interview with the victim's mother and key players in the case.

A daughter's determination to learn more about her mother's mysterious death leads to the reopening of a 30-year-old cold case.

Florida, 2009: Quinn Gray, a homemaker, calls her husband Reid and tells her she's kidnapped, she doesn't know where she is and three men want $50,000 to release her. The Grays are wealthy, so Reid has no problem getting the money together quickly. She calls him repeatedly with money drop locations but the directions are so rushed and chaotic that no money is exchanged. Quinn's mom takes over and drops the money in a parking lot. Three random guys pick it up and call 911 so they don't get into trouble. The money drop is a bust. But, as investigators dig and dig, a sighting of a kidnapper on a security camera leads to a bomb blast of a revelation.

When a former hockey player discovers his wife murdered in their home, his daughter says she saw a burglar.

The investigation into the disappearance of a mother of three in Colorado reveals she was living a double life.

When shots ring out at a home in Saco, Maine, Rachel Owens is found shot in the head. Police launch a complex investigation that involves three states, all holding pieces to the puzzle. Andrea Canning reports. Dennis Murphy reports.

In the early morning dark in San Antonio, Texas, a husband shot his wife, saying he mistook her for an intruder. Was this a terrible accident or a case of deliberate murder? Andrea Canning reports.

A woman continues searching for answers after the investigation into her daughter's murder goes cold. Keith Morrison reports.

When a fire is set to cover a murderer's tracks in Bergen County, N.J., for the third time in a year, authorities suspect a serial killer may be on the loose.

The battle between a wife and a mistress for one man's heart leads to a deadly car chase.

An unexpected revelation may change the fate of the man convicted in the case of a young woman found dead in the Kentucky warehouse where she worked.

Keith Morrison reports on the mind and myth of Charles Manson. The one-hour special features rarely-seen video of Manson and interviews with his former parole officer and a “Manson Family” confidant. Morrison also speaks with key players in the case including: Gregg Jakobson, former music producer; Barbara Hoyt, former Manson family member; Debra Tate, victim Sharon Tate’s sister; Anthony DiMaria, victim Jay Sebring’s nephew; Virginia Graham, key witness for the prosecution; and Manson expert and author Jeff Guinn.

A luxury car salesman receives a visit from a beautiful client. It turns out she is not interested in buying a car but in planning a murder. Andrea Canning reports on her twisted scheme.

When film executive Gavin Smith vanishes, Los Angeles detectives search for clues amid reported sightings and suspicious circumstances. The case takes a dramatic turn when Gavin’s wife reveals painful secrets. Keith Morrison reports.

After a father goes missing, his body is found in a field several miles away. Investigators start putting the pieces together and uncover multiple suspects – even within his own family. Andrea Canning reports.

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

When a mother of four dies unexpectedly on Valentine's Day, her death is attributed to natural causes, but a detective suspects that someone murdered the woman.

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.

As a murder victim's sisters dedicate themselves to finding the killer, an unexpected source turns the case upside down.

A community comes together to search for a young woman who goes missing from a Halloween party.

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

Author Rachel Jeffs talks about what it was like to grow up as the daughter of the self-proclaimed prophet of the Fundamentalist Church of Jesus Christ of Latter-Day Saints, Warren Jeffs.

An investigation of a woman found murdered in Fort Worth, Texas.

A comprehensive look at the 1989 murders of José and Kitty Menendez by their sons, Lyle and Erik; featuring interviews with key players in the case, including Lyle Menendez.

An anonymous letter leads authorities investigating the poisoning death of a chiropractor to an unlikely suspect.

A small-business owner and his bride are murdered shortly after their wedding; police suspect a family feud is the cause.

A look at the case of con man John Meehan, including interviews with his wife and her daughter, his ex-wife, law enforcement officers, and the Los Angeles Times reporter who shined a spotlight on the story.

A couple's anniversary celebration ends in murder during what appears to have been a home invasion, but investigators believe the suspect might be connected to the victim.

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

A murder outside Pleasantville, Iowa, divides a family and forces one man to take the investigation into his own hands.

When a young mother disappears after leaving her infant in the care of her local pastor and his wife, Florida detectives search for her for five years, uncovering a web of secrets and lies.

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

A former marine who once was the hero for a woman in an abusive marriage may have let his desire to help go too far.

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

When dozens of homeowners find themselves on a Napa Valley hilltop surrounded by fire, two teams of daring chopper pilots risk their lives in a mission to rescue them.

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.

Former DEA agent Andrew Hogan details his search for Mexican drug lord Joaquín "El Chapo" Guzmán with never-before-seen videos and photographs.

When a young Florida law professor is shot, baffling his family, friends and police, a complicated investigation leads police to a surprising theory of the crime; the victim's family speaks out for the first time.

Four families that barely escaped the catastrophic Montecito, Calif., mudslides alive, and the rescuers who risked their own lives to help.

A bizarre cyber-revenge case lands a young woman in jail; an unexpected twist reveals the real culprit.

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

Former USA Gymnastics national team coordinators Bela and Martha Karolyi talk with Savannah Guthrie about the Olympic sex abuse scandal; Olympic gold medalist McKayla Maroney describes the sexual assault she endured.

The disappearance of a young woman from Bend, Ore., leads to an intense manhunt after the suspect embarks on a two state crime spree.

When one woman breaks off her relationship with a boyfriend she says abused and stalked her, he moves on to something even worse.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out that may hold the answer to her disappearance.

Rapper Meek Mill interview; exploring controversies surrounding the criminal justice system, including the parole system, wrongful convictions, challenges faced by law enforcement, alleged police abuse and more.

When a young woman is found dead in a field on the outskirts of Green Bay, Wis., a fitness tracker helps detectives solve the mystery.

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

A look at the future of marijuana in the United States, including state-of-the-art science and interviews with patients, their families, leading scientists, doctors, federal legislators and a former professional football player.

Interview with Andrea Constand, the first woman to pursue charges against Bill Cosby, and four other Cosby accusers who testified against him.

Sixteen parents fighting to end college hazing at fraternities speak out together for the first time; cases of alleged hazing at various universities.

A recent law school graduate in Georgia who has a promising future disappears without a trace.

A father in Hawaii tackles setback after setback in his fight for justice for his murdered daughter.

A woman's DNA test sends her father halfway around the world to confront his past.

When a prominent attorney claims to have accidentally shot his wealthy wife, the local prosecutor questions his story.

The reality of life along the U.S.-Mexico border, including interviews with families seeking asylum, news on the controversial policy of separating migrant families, and fact checks on claims made by both political parties.

A woman whose ex-husband killed six people in Arizona, allegedly targeting individuals with connections to their divorce; interviews with experts on the topics of domestic violence and mass murder.

A husband convicted of murdering his wife is granted parole; others fear he may kill again.

An in-depth look at the journalists who exposed the dangers of cult leader Reverend Jim Jones; interviews with witnesses to murders carried out by Jones' followers.

A popular high school student is found murdered in her bed; two students help police solve the case.

When two mothers meet after one of their sons disappears after a college party, their search for answers leads them down an unexpected path.