Dateline

When a successful doctor collapses at her home, her blood test reveals cyanide poisoning, shocking the medical community and resulting in a criminal investigation. Reporter: Dennis Murphy.

When loving mother Lisa Knoefel is stabbed to death in her home outside Cleveland, her newly-blended family is shattered.

A doctor ingests a lethal chemical, causing friends to wonder if it was an attempt at suicide or if he was poisoned -- until a love triangle is uncovered.

Twenty years ago, a young mother was about to embark on a new life in a new city. Instead, she disappeared, leaving behind her five year old son and an apartment filled with moving boxes.

The Harkey family was famous for pecan harvesting in the Texas Hill Country. Bonnie was the matriarch with a powerful grip on the family’s fortune and when she went missing, her community was stunned. Bonnie’s adopted grandson had a troubled past but Bonnie was one of the few people on earth who had ever loved him so, when he admitted to killing her,  it had police wondering what would motivate him to do this?  Was an inheritance the cause of a family feud? Turns out, this plot was more tangled than the branches of a pecan tree.

A brilliant woman who rose from poverty and became a successful criminal defense attorney is murdered; investigators look into her clients and follow a bizarre string of clues.

A prominent doctor's wife is murdered on Valentine's Day. Investigators had plenty of theories to work with, but the suspect they brought into custody shocked everyone.

For 27 years, Judy Gough’s children kept a dark secret. The terrible truth was only unleashed when one of them could no longer live a lie about the disappearance of their father.

Kate Snow reports on a drug industry insider, Steven Francesco, whose son died suddenly from a rare side effect of taking antipsychotics. Francesco’s grief and remorse launched him on a journey to find out more about the system he thought he knew.

Amy Preasmyer, 16, and Ricky Cowles, 21, were in love and hiding some other secret that would soon change everything.

Two years after the disappearance of his wife, Josh Powell kills his two sons and himself; Josh's last in-depth TV interview; a 911 dispatcher discusses the emergency call placed by a social worker.

Everything was going great for Playboy model wannabe Paula Sladewski until New Years 2010. The blond bombshell went missing, and days later, her charred body was found.

A Virginia man learns that his wife and son have been kidnapped while on vacation in the Philippines by an Islamic militant group. The man soon receives a call demanding $10 million in ransom.

Meet Rhoni Reuter, the long-time girlfriend of former Chicago Bears football player Shaun Gayle. Stunning, stylish, sweet and pregnant - and then suddenly murdered in her own home. Who could have killed a woman with no enemies?

A devoted father gunned down in his own home by someone on the stairs. It was a crime that made national news because of its unusual defense. The suspect argued he was simply too obese to carry out the killing. Would that argument sway the jury?

A woman from a small town moves to the big city of Las Vegas, where she finds a new career and a new love, then she vanishes, and her body is found within a few days, but discovering her killer will be a tougher mystery to crack.

This was one of the biggest cases Reno had ever seen:  Brianna Dension had disappeared on a winter's night.  What had happened, no one knew. Where it would lead, no one could predict. But this entire city would soon galvanize for a single mission: To find Brianna.

A twenty-three year old woman goes missing from a high-end shopping mall in Plano, TX. Her family members search for her, while police try to find out who might have been responsible for her disappearance.

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.

A popular and attractive young woman, Robin Hoynes is murdered while working at a fast food franchise in 1984. There are few clues, except a strange and un-explainable piece of foam found at the crime scene.

Dateline's Keith Morrison retraces the steps taken by a retired detective to dust off a cold case murder with the help of a photographer’s diary.

Mark and Mary Beth Harshbarger were, to some, the perfect couple.  In 2006, they took their ideal vacation: a hunting trip to Newfoundland, Canada.  But when Mary Beth took a shot at what she said she thought was a bear, this perfect couple's world was torn apart.

Hundreds of Americans die every year from accidental carbon monoxide poisoning, but according to police, one of those deaths wasn't an accident - it was murder.

Lisa and Scott Pattison marry on a fairy tale day and build a life together in central Indiana. But one day in July 2009, their marriage comes to a horrifying end as Scott races his gravely injured wife to the hospital, calling 911.

A little girl beats the odds and inspires a city. It all started with a crime not even police could believe: the girl, just a toddler, was shot in the head deliberately... left for dead by a killer who disappeared into the night.

It's two weeks before Christmas when a sudden disappearance sends a chill through a sleepy town in upstate New York. Jennifer Ramsaran -- wife and mother of three -- has vanished.

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.

Keith Morrison reports from Alaska on a mother's emotional crusade to find her daughter's killer. Even after the case went cold, she continued to her campaign, determined to find 'Justice for Bonnie'.

A father and his infant son were shot on the streets of Miami. The son survived, the father didn't and widow Cindy Carballo was wracked with grief. Then, Cindy killed her husband’s business partner. Was this a revenge murder or self-defense?  

A college freshman was found brutally beaten, a crime scene so bloody police couldn't ID the victim. But identifying the killer wasn't nearly as hard. He admitted what he did. It was why he said he did it that became the foundation for his defense.

Vern Holbrook seemed to have it all: A thriving estate company and a beautiful family. So when this beloved patriarch failed to show up at a meeting with his daughter-in-law, she was concerned. Was Vern delayed at work or was it something far worse? 

One murder in broad daylight. The case went unsolved. Then another brutal attack almost exactly a year later and, this time, the victim went missing. When a photograph of the two women together from years earlier surfaced, authorities believed they unearthed a chilling connection. Was a serial killer stalking the women of this tight-knit church? It was a race to connect the dots.

Heidi Bernadzikowski seemed to be turning her life around. She had a steady job, a boyfriend she could take to meet the parents. Talk, even, of a summer wedding. Then, she was murdered in brutal fashion and there was a bizarre clue: The #1 scrawled on the wall near her body.  Her boyfriend was devastated and had a strong alibi. The case went cold but, a decade later, there was a DNA hit.  But the man lived nearly 1,500 miles from the victim and investigators couldn’t find an obvious connection. Did the man act alone, or was there another explanation?

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.

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

Peggy Nadell was a beautiful and wealthy widow in the suburbs of New York City. She had a million dollar smile and a multi-million dollar estate. When she was found brutally murdered in her own home, a likely suspect emerged. But this was a twisted case of betrayal and greed, and would not be easy for investigators. Family secrets and secret resentments would be uncovered before the killer was discovered.

A few weeks before Christmas Jason Payne made a frantic call to 911: his wife and stepson had been shot in their bedrooms. Nichole Payne was shot in the back of the head and her son had been shot in the face. Investigators thought it looked like a murder-suicide. Then, they discovered a rag with blood on it outside, but both victims were inside.  What was really going on behind closed-doors? Two deaths, two trials, and one truth.

Sabine Buehler had moved to an island off sunny Florida for her own slice of heaven.  When she vanished, her friends knew she hadn’t left on her own. But no one could imagine anyone wanting to hurt this happy woman. Her personal life was very complicated and a list of the “usual suspects” would end up leading police down a long and winding path in the sand.

A young woman living on her own was murdered in the middle of the night. It was crime that jolted a sleepy seaside community. A killer was walking among them. Young, fun and pretty, Corey Parker had plenty of admirers. Had one of them liked her too much? A strange co-worker, an adoring friend and a young man she called the night creeper were among the potential suspects. There was a pile of evidence but the truth would be revealed by a tiny telltale clue.

Heidi Allen was sweet, spirited and super smart. She took a job at a convenience store to earn cash for college and was working the early shift on Easter Sunday. Then, she vanished. A man confessed to her murder. Mystery solved? Maybe not. Years later, a horrifying story and an old case blown wide open. Two women teaming up to find out the truth uncovered an astonishing twist: a teenager with a secret identity. Did she also have a secret enemy?

For newlyweds Brian and Katherine Laird, Big Sky Country was a paradise. For one of them, it would also become a grave. Kathryn Laird was an intelligent, hard-working beauty who lived life to its fullest. So when her body was found in a river, the explanation that she took her own life didn’t make much sense. Was this a suicide or could it have been something far more sinister? In a desperate search for answers her family embarked upon a decades-long quest for the truth.  

When a Montana man bought his slice of heaven in the vast western wilderness, it would set off a chain of events that ended more like a nightmare, with one man shot dead and another charged with murder. How did this neighborly dispute turn deadly?  Only two men were there and the man who shot first told his story, claiming it was kill or be killed. Did the dead man’s body tell a different story? A daughter was in a search for justice. 

Lindsay Buziak was a charismatic, young real estate agent who thought she'd just landed the assignment of her dreams: Helping a couple buy a million dollar home. But what seemed like a golden opportunity turned into a mysterious case of murder after Lindsay was killed in the luxurious house. The longer her curious death remained unsolved, the more investigators learned about Lindsay’s life - and the people in it.

She was a free spirit who had yearned to make it in Hollywood. But she made headlines instead when she vanished.  Brittany Tavar was generous, opening her life to anyone she thought needed her help. But after she disappeared her family discovered that her giving nature exposed her to more danger than they realized.  There was a handsome boarder, the friend turned-enemy, or could’ve the free spirit just up and left on her own? 

He was a high society hustler with a flair for spinning lies but was the con man also a killer? The murder happened decades earlier and now Christian Karl-Gerhartsreiter was living across the country under an alias with a recognizable last name, as Clark Rockefeller, but his cover was blown when he made headlines for kidnapping his daughter. Police in California immediately knew the face, but not the name. He was the prime suspect in the 1985 murder of his landlord. But to prove their case, detectives must retrace the phony Rockefeller’s steps along a decades-old trail of deceit.     

They were a couple who seemed made for each other. Seemona Sumasar thought she had met Mr. Right, but how wrong she was.  Nothing was as it seemed. Hope and promise had been replaced with deception and violence. Then, an elaborate plot to get revenge so twisted and devious, it nearly succeeded in fooling police and prosecutors.  The alleged victim was now accused. Seemona landed in jail and lost just about everything. Was an innocent woman in prison for a crime she didn’t commit? 

Douglas Murphy, FBI ballistics expert, discusses how agents discovered the unique type of weapon used in the murder of the federal prosecutor.

After Christina, the twenty-three-year-old fashionista, went out to a high-end shopping mall on a Friday night and vanished police questioned everyone. The friends she was with. Her ex-model boyfriend. They knew someone was lying, but who?

After teenagers Rachel Shoaf and Sheila Eddy are convicted of murdering their 16-year-old friend, Skylar Neese, Skylar's parents discuss the night she disappeared; Rachel Shoaf's therapist, Patricia Bailey, shares her thoughts.

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.

Cher Hughes made her dream come true in the faraway islands of Bocas del Toro, Panama.  It's a place people go to escape. Who could have know that evil could find a place in paradise too?

NBC’s Cal Perry brings us the latest on what went on inside the two vacation homes that the Obama administration ordered Russian diplomats to move out of.

A detective comes face to face with a serial killer when she promises to get justice for the mother of a victim whose body turns up at an Anaheim trash facility.

Dateline investigates the 1994 murder of Newport Beach millionaire Bill McLaughlin. Fifteen years after the murder, the police investigation eventually leads to McLaughlin's wife and a former NFL linebacker with whom she was having an affair.

A look at the crimes committed by Charles Manson and his followers in 1969, including archival footage and interviews with those close to the events.

A chance encounter at an El Paso, Texas bank leads local contractor John Mimbela on a multi-year crusade for justice.

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.

Annie Kasprzak has a second chance at a happy life after being adopted by her case worker. Then, one night in March 2012, Annie vanishes. Her parents find a note in her room that reveals a secret Annie has been hiding.

Friends of accused murderer Robert Durst talk about his recent arrest in New Orleans and his whereabouts over the past 30 years.

When a beloved firefighter is murdered just outside Sarasota, Florida, investigators discover a twisted tale of secrets, lies and infidelity.

Pittsburgh girl Meghan Verikas falls in love with a successful Houston doctor. But things aren’t quite the fairytale they seem, and Meghan quickly learns there’s more to Leon Jacob’s story than meets the eye.

A young woman is shot in her home just outside Salt Lake City, Utah. Was it an accident? Or something far more sinister?

Kate Snow sits down for an exclusive in-depth interview with Andrea Constand, the first woman to pursue charges against Bill Cosby that ultimately led to his conviction.

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.

On Black Friday, police are called to the scene of a brutal murder. The victim is beloved by her friends, girlfriends, and co-workers. She had no enemies - or did she?

Dennis Murphy reports on the mysterious death of a young mother in Ohio and the ensuing investigation that spans years and multiple states.

Ira and Susan Bernstein seem to have it all: a big house, money and a growing family. But things get complicated when a new love interest enters the picture.

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.

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.

Newlywed Dalia Dippolito returns home from the gym to find a crime scene – and awful news.

The murder of a Hollywood stunt man leads investigators to a woman once married to a movie star mobster.

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 popular, superstar high school athlete, Jimmy Keene, seemed to have it all growing up in the river city of Kankakee, Illinois. But then, he began selling drugs and moved to Chicago, where his business boomed but a danger lurked 150 miles south that would change his life forever.

Dateline examines the murder of Ben Novack Jr. the wealthy heir to Miami's famous Fontainebleau Hotel. The police investigation into the murder causes a rift between his wife and step-daughter.

It was a brutal and baffling crime: a husband shot dead in his own bed. No one else in the house was hurt, not even his wife, who was sleeping beside him. Investigators were suspicious, but there were more surprises in store.

On a hot summer day in 1994 convicted murderer Randolph Dial escapes from prison, taking the deputy warden's wife with him. But was she a kidnapped hostage or a willing accomplice?

Dateline looks into the death of Stephanie Roller Bruner and the district attorney's effort to pin the case on her husband.

A former homecoming queen taking her first steps into adult life is brutally murdered; the investigation centers on two men and a mysterious black bag that seems to come out of nowhere.

It was a mystery that stumped investigators for years; a college student disappears after a night out clubbing; her mother thought she was at a sleepover with friends and it takes an eagle-eyed detective to find the truth buried in a pile of lies.

A young mom, married to her high school sweetheart, vanishes; did she leave her family to start a new life or was there another reason for her disappearance; decades later her grown son faces a dark truth at the core of this mystery.

Newlyweds Paul and Linda Curry come down with a mysterious illness. Paul recovers, but Linda is hospitalized and the strange symptoms won't go away.

Tim Permenter calls 911 to report a horrible discovery; his girlfriend Karen Pannell, a one-time model and flight attendant, has been murdered in her kitchen. On the wall next to her body is a message written in her own blood: the letters R O C. What does it mean?

Family man Jack Jessee is murdered in his home, but the case goes cold until a dogged detective unravels a conspiracy and pins down the perpetrators.

An in-depth interview with Charles Manson's former parole officer; rarely seen video of Manson; interviews with victims' family members, and others close to the case.

When a high-school boy goes missing in 1982, police believe he ran away, but his family fears he was murdered.

Just off California's fabled Catalina island, weekend boaters make a grim discovery-- a body floating in the water. The victim turns out to be a well-known radio personality. What happened to Steven B. Williams?

Michelle Young was married to her college sweetheart and pregnant with their second child when she was murdered. In the search for her killer, detectives uncovered a marriage riddled with secrets but cracking this complicated case took years.

A loft apartment in downtown Salt Lake City, Utah, is home to an eclectic group of residents. When a wealthy businessman starts working with two of them a chain of events is set in motion that leaves one of them dead, another arrested for murder.

The three young Hawk children arrived home one evening to find their mother was missing. Today, questions still remain in her disappearance.

Keith Morrison tells an epic story of love and loss in a foreign land. Two young teachers - one from Indiana, the other from New Zealand-fall in love on the eve of one of the greatest natural disasters in recent memory, the 2011 earthquake and tsunami in Japan. Would their love survive? Would they survive?

In the lore of the Lone Star state, Texas lawmen rank pretty high: the good guys in the white hats. Their badge brought prestige - their gunfights, the history books. But in the modern-day town of Denton, Texas -- the "little D" outside "the Big D" of Dallas - there served one Texas lawman with a curious past, all locked up in a box.

Kate Snow speaks with two families about their unforgettable stories of surviving the 2013 Westgate Mall terrorist attack in Kenya.

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

He dreamed of being the next Steve Jobs: a young entrepreneur who wanted to change the world. But his world came crashing down one morning with four gunshots. This was a crime of passion: a fatal triangle involving a husband, a wife, and a boss.

“After The Party,” looks into the mysterious death of a young mother who ended up dead with a gunshot wound to the head after hosting a New Year’s Eve party. What was at first ruled a suicide was later thought to be a homicide that was covered up by the police to protect one of their own.

When Debbie Kelly, a busy executive, remodels her home in a gated community, she finds unexpected love – and marriage -- with her contractor, Lars Itzo. But in the early morning dark in San Antonio, Texas, he shot his wife, saying he mistook her for an intruder. Was this a terrible accident or a case of deliberate murder?