In Gulf Harbors, Florida, retiree Jean Schwarzkopf is a woman of means who enjoys the company of younger men. When she is found murdered in her own home, there are several suspects. Chris Hansen finds the motive is what gives the killer away.

In Planada, CA, young mother Ana Ceja drives off with her 3-month-old son...and never comes back. But then, police find her empty car, a discarded car seat, and a corpse burned beyond recognition out in the orchards. Chris reveals a shocking tale.

In Topeka, KS, Mike Sisco and Karen Harkness have invited their parents over to celebrate their upcoming wedding. Instead, the couple is found gunned down in their own bed. Whoever did it left no trace. Chris goes after the motive to the mystery.

Yale University medical researcher Annie Le is about to get married, but she vanishes on her way to her lab. The frantic search for her turns into a nation-wide sensation. Now, for the first time on TV, Chris reveals what really happened to her.

In Canyon, TX, teenager Fred Moseley is left home alone over a long weekend – and abruptly disappears. His beloved new car is found abandoned on the outskirts of town… his shotgun missing. Chris Hansen investigates a mystery that lasted ten years.

Although Josh Bailey suffers from mental disabilities, he’s managed to carve out a decent life for himself. But after he disappears, his parents fear he’s fallen in with the wrong crowd. Chris travels to Chapel Hill, NC to uncover the true story.

Jim Madonna doesn’t have much to be grateful for on Thanksgiving. He recently lost his job. But when his son finds him shot to death, killed in his own car, all of Taunton, MA is shocked. Chris reveals a grim holiday tale of murder and betrayal.

In Longmont, CO, Tammy Tatum is brutally murdered right near her one-year-old daughter, Sadie. Now 24, Sadie reveals to Chris Hansen the shocking truth... that the killer was someone she knew her entire life.

The brutal shooting of Stephen Perret looks like a mob hit. Police have little evidence, but soon discover Stephen made a call just before he was murdered. Chris tracks down the person Stephen called... who reveals the identity of his killer.

Detectives searching for wealthy scientist Walter Sartory believe he's been kidnapped and is being held hostage for his fortunes. Chris Hansen discovers that investigators were in a race against time to find Walter before it was too late.

College senior Susannah Chase had everything to live for, but just a few days before Christmas she was brutally attacked only yards from her home. Chris Hansen travels to Boulder, Colo., to discover the shocking truth behind her murder.

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In California's Simi Valley, 20-year-old Megan Barroso is heading home from a July 4th party when she disappears. Her car is found stranded on Highway 23 - riddled by bullets from an AK47. Chris unfolds the harrowing tale of a truly evil predator.

The show takes a look into the disappearance of a woman and her three daughters.

In St. Augustine, FL, Jesse Whitley is a small-time scoundrel who drives off on a stormy night, never to return. His body is found floating in the St. John’s river, and police have a list of suspects. It takes 17 years to bring his killer to justice.

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The show takes a look at the case of a couple of teen lesbian lovers who killed one's grandparents after they attempted to break up their relationship.

he show takes a look at the case of Anthony Sowell, a Cleveland-based serial killer who was convicted of killing 11 women.

The show takes a look at the murder of a pregnant woman.

The stabbing death of a Vietnam veteran causes Seattle detectives to find out about a crime ring led by a Gypsy con woman.

Detectives called the crime scene "a slaughterhouse." Matthew Hoffman killed two women and a boy in an Ohio home before kidnapping a thirteen-year-old girl and holding her hostage. Once arrested, Hoffman’s bizarre obsession is revealed.