A woman is found strangled after a powerful storm; police focus on a fiancé and a co-worker with a crush until they hear from a flood of women who've had chilling encounters with a stranger; It seemed a predator was stalking the women of Austin.

Diane Marcell walked into her home and found her daughter covered in blood. Then, she felt pure terror. The attacker said she was next. A single drop of blood was the key to finding him, but it took nearly a decade to unlock its secrets.

A 4-year-old girl abducted and raised by her kidnapper spends decades trying to get back home, and she finally accomplishes her goal; as it turns out, that ending was only the beginning.

Angel's Landing was a community of free-spirits with Lou Castro at its center. Investigators were suspicious of the mysterious deaths happening there. Now, commune members have courageously decided to tell their stories in hopes of helping others.

Beloved by his colleagues, Mark Hasse was a fearless prosecutor. He worked to put criminals behind bars and making enemies was a hazard of the job. He didn’t know it, but a killer was lurking and Mark wasn’t the only target.

They were bright young women out for a little fun with their friends. Kenya Monge and Lydia Tillman didn't know each other but they would be forever related, both falling prey to a smooth-talking stranger with a terrifying secret.

It was an affluent neighborhood with tree lined streets. Violent crime was unheard of here until that morning when, under the very noses of the cops, a terrible murder occurred. Investigators found a riddle, a deception, a piece of pure evil.

A bank executive tries to rob his own bank. Investigators think it is an inside job but eventually learn the crime is connected to a spree carried out by men who managed to keep their identities secret, praying on people who did the opposite.

Detective identify multiple suspects after a mother disappears, but they later face scrutiny from the woman's family due to the lack of answers they have provided.

It began with a young mom abducted at gunpoint. Her family and veteran investigators spent desperate days trying to find out where she was but they never could have guessed WHO had her and WHY.

An explosion in a rice field in Colusa County, California kills farm manager Roberto Ayala. But was it an accident or murder?

Dateline has been covering this twisted tale for more than a decade. Pizza deliveryman Brian Wells robbed a bank with a bomb locked around his neck and, from there, it turned into one of the strangest cases the FBI has ever encountered

After a young mom is found dead on the side of a country road, 40 miles from her Knoxville home, investigators scramble to figure out how she ended up there.

A mother, her son and a cousin are kidnapped by terrorists while on vacation; a father turned negotiator tries to end the international hostage drama, but the price of freedom is a huge ransom.

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

What happened that September night when romance turned to danger? Something went terribly wrong and a woman slipped over the edge of a cliff. Did she fall by accident or was she pushed? It would take almost 20 years to find answers.

For investigators, motive can be the hardest thing to find. This crime took place in Florida but detectives didn't discover a motive for murder until they looked into a tropical island thousands of miles away, where a festering grudge was born.

It started with a party, high school seniors celebrating graduation. Before the night was through, one man was dead and two teens were facing a long fight for justice.

Amanda Lindhout was a journalist braving the world's most dangerous hotspots. Then, she became the story. What she endured from her captors was terrifying. Years later they found her again and secret agents put a daring undercover sting into action.

It started with a frightening horror flick from the '80s. Then decades later, it was happening for real. Four people were dead and investigators believed they were chasing a serial killer. Could this old movie hold the key to solving these cases?

Young nursing student Michelle Le had disappeared. Something drew her out to her car. As her loved ones launched a very public effort to find Michelle, investigators began their own methodical search. Was she missing or murdered?

Police believed a pair of double homicides in Nebraska, five years apart, might be connected. Investigators working to solve the crimes feared the killer might strike again. Could they catch him in time?

Kevin and Morgan Mengel were happy at first, but when the marriage went bad, he went missing. Police wondered if he simply left, but a family’s relentless pursuit lead to a stunning confrontation and, eventually, the truth.

Kelli Bordeaux was just starting what she hoped to be a long career in the military, but fate had other plans. When she vanished, friends and family launched a frantic search, but it was stranger hell-bent on justice who uncovered the ugly truth.

A successful, seemingly healthy doctor collapses at home and is rushed to the ER, leaving friends and colleagues puzzled.