When Bonnie Craig is found dead, police collect DNA but it doesn't match anyone in the system; twelve years later, there is a hit but the man is thousands of miles away; turns out, prosecutors would need more than DNA to convict a killer.

A U.S. Air Force captain who is deployed overseas for long stretches of time finds himself caught in the crossfire resulting from a love triangle at home.

When Debbie Hawk vanishes, her friends and family are left searching for answers; investigators discover that Debbie was planning to divulge secrets and wonder if she has been silenced as a result.

A toddler is shot in the head and left for dead; despite the odds, she stuns everyone with her will to survive, while a detective vows to crack the case, no matter how long it takes.

A young man from small town Indiana heads to Japan where he falls for a beautiful woman; then, they are caught up in one of the biggest natural disasters in history.

Tara Ord is a beautiful young woman with big dreams, then she vanishes without a trace; it will take years for determined cold case detectives to uncover the long buried clue that blows this case wide open.

Debbie Kelly and Lars Itzo make their marriage of opposites work; then, Debbie is shot dead in the dark of night; investigators ask whether her death is a case of mistaken identity or the bloody end to a marriage gone bad.

Fitness executive Nicole Pietz is married to the man of her dreams, then she goes missing after failing to show up for dinner with her husband and friends.

In Wisconsin, Steven Avery and his nephew, Brendan Dassey, are convicted of killing Teresa Halbach in a case that defies easy answers.

Investigators uncover the death of a show business stuntman.

A talented, young art student is murdered. The killer left no fingerprints and no DNA. Police zeroed in on three fellow students, and soon, the dark portrait of a killer begins to emerge.

The wealthy heir to a legendary hotel is murdered, and the list of possible suspects is long. Investigators soon learned someone close to the victim was also in danger.

When Cathy Torrez never comes home after work, her family fears the worst; an intensive search ends after her car is found, with her body in the trunk; it take years to get to the truth.

A convict is offered a deal as tempting as it is dangerous; he must go undercover in a psychiatric hospital to get information from a suspected serial killer in order to win his freedom, but there's no guarantee he'll get out alive.

A woman is murdered in a home invasion. Then, her best friend and neighbor is shot the following night. Investigators unearth disturbing secrets that suggest the cases may be linked.

It's a mystery with a mind-boggling twist; the deputy warden's wife claimed she was kidnapped by an escaped convict and held captive for more than a decade; but was she really a hostage or a willing accomplice.

It all began when a best selling author found his wife at the base of the stairs; the story makes headlines and has been covered for more than a decade; Michael Peterson answers questions.

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.

She was a beaming bride; it was a haunting death; Sarah and Ryan were newlyweds when she drowned in the bathtub; did she die of natural causes or was it deliberate; it took three trials to find the truth.

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.

Young women out for a little fun with their friends, Kenia Monge and Lydia Tillman don't know each other, but their stories will become forever intertwined, both of them falling prey to a smooth-talking stranger with a terrifying secret.

She was a dancer who married a dashing photographer; they seem to have the picture-perfect life -- until the bone-chilling night she disappeared; in a case filled with twists, could the victim help solve her own murder.

Young nursing student Michelle Le disappears; something draws her out to her car; as her loved ones launch a very public effort to find Michelle, investigators begin their own methodical search, suspecting she may have been murdered.

The initial investigation into the 1981 disappearance of Torrance, Cal., resident and mother-of-two Carol Jeanne Lubahn hits a dead end. Thirty years later, however, the police re-open the case and turn to social media for help.

In August 2004, all eyes were on Hurricane Charley as it pounded Punta Gorda, a small town on Florida's Gulf Coast. In the midst of the tempest, one Florida man was holed up in a hotel room, seeking shelter from the storm and hiding from his past.

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.

It was Easter Sunday; the Stock family celebrated at home; hours later, gunshots turned their farmhouse into a house of horrors; there was an arrest but one tiny clue didn't fit; this case was far from being solved.

When Karen Pannell is found stabbed to death, a message scrawled in blood seems like a beacon that could lead detectives to her killer; it takes a dogged forensic specialist with a keen eye to unravel the mystery.

When a dog trainer with celebrity clientele disappears, investigators track down a suspect with the help of two witnesses.

Larry McNabney has a thriving career and a wife he adores, but then vanishes; at the center of the twisted mystery, three lives tangle together in a love triangle, including one who hides a secret identity.

Dr. Mark Weinberger, a successful surgeon, hides a secret from his medical staff and from his adoring wife; after a malpractice suit and a death, the doctor vanishes, sparking an international manhunt and a family's fight for justice.

Soon after Angie Dodge's murder, Christopher Tapp admits he is one of her killers; police capture his confession on videotape, but the victim's mom, who once campaigned to put Tapp in prison, fights for his freedom.

A look at a crime that took place in Florida, where detectives didn't find a motive for murder until they looked into a tropical island thousands of miles away, where a festering grudge was born.

Jack Jessee was a family man who didn't seem to have an enemy in the world, up until the night he was killed; the case goes cold but a relentless detective is determined to catch Jack's killer.

After four people turn up dead, investigators chase a serial killer who may be reenacting scenes from a horror movie released in the 1980s.

Steven B. Williams was a DJ with a golden voice. Then he vanished. It was a mystery that stretched from California to Montana, and the clue to it all? It was wrapped in a napkin, tucked in a cabinet, hidden in a library, but would anyone find it?

She was beautiful, trusting and troubled; the young woman from a prominent family was just turning it around and realizing her promise; then she vanished; when the police seemed unable to find her, her family hatched a plan to solve the mystery.

Judy Carlson lived in a painful limbo. Her son disappeared without a trace. Years went by and she may never have known his fate if not for a rookie detective's dogged work but to solve this cold case, the investigator also need the help of a killer.

Was he missing or was he hiding? On the surface, it didn't make sense: He had a wife, a good job, a daughter he loved. Investigators were told he also had a secret and they went on an undercover mission to find the truth.

How well do you really know your neighbors? It's a question at the center of this mystery. The neighbors you're about to meet enjoyed mixing business with pleasure then a murder made them face the reality that a killer was in their midst.

Detectives often hit dead ends that can stop them cold but, for one young detective, dead ends were just another place to start. She'd beaten the odds in her own life. Now, she was determined to beat them on the job using her head and her heart.

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.

Florida, 2009: Quinn Gray, a homemaker, calls her husband Reid and tells her she's kidnapped.

In a plot straight out of an Alfred Hitchcock film, a woman peers into a neighbor's yard and catches a glimpse of something unsettling; she sets into motion a chain of events that will divide a family and a jury.

A romantic interlude on a September night turns tragic when a woman slips over the edge of a cliff and falls to her death; authorities ask whether she fell or was pushed, and it will take 20 years to find the answers.

A wife and mother of three disappears without a trace. Could her home's security cameras hold the key to solving the mystery? Dennis Murphy reports.

A community is left in shock when a Cornell student and star athlete gets caught in the middle of a homicide investigation.

Dark secrets come to light as officials investigate what happened to a wife and mother of three who was found dead in her bathtub.

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

When remains are found amid the rubble after a house fire, authorities soon discover the incident was no accident.

After a woman reports a prowler, police find her Olympic bronze medalist husband dead in their backyard.

When a Chicago woman from a big family goes missing, investigators begin to suspect a man in her life is full of secrets.

An investigation into the murder of a beloved couple in South Carolina reveals a feud and divides a family.

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

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

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

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

An Army veteran vanishes before her college graduation. A massive search turns up nothing, but detectives do find a clue: a cryptic 911 call that helps uncover the truth and exposes a twisted story of unrequited love.