A young Fairfield, Ohio, woman, 21-year-old Katelyn Markham, vanishes one summer night in 2011, prompting her community to conduct a massive search. When her skeletal remains are found in Indiana two years later, investigators question her friends and family to uncover her killer, but it takes 12 years and a detective with dogged determination.

A new father is found dead on the side of a road. Then the stabbing of a young woman leads police on a high speed chase. Could these two chilling murders be connected? Josh Mankiewicz reports.

In Humble, Texas, a frantic 911 caller, 16-year-old Keri Murphy, reports hearing her mother's screams after an intruder entered their home. When first responders arrive, they find Mary Ann Murphy dead after receiving more than 70 stab wounds. What happened on that dark summer night?

A monster storm had rolled into Canton, Massachusetts, and Karen Read's boyfriend, police officer John O'Keefe, was dead, his body discovered in front of another officer's house. Karen was charged with John's death. Was she to blame?

In Marietta, Georgia, a woman's murder shines a light on an unsolved mystery from years earlier. As the connection between the two cases becomes clear, a long-hidden truth surfaces. Could a master manipulator be behind both crimes? Andrea Canning reports.

After a 2011 Halloween party at a country club in Dyersburg, Tennessee, Karen Swift, a wife and mother of four, vanishes. Nearly a decade later, a private investigator claims to uncover chilling new clues that turn the town upside down.

Latest developments and new interviews in the high-profile murder trial of Lyle and Erik Menendez; a scripted show reignites public interest in the case.

Dubbed the 'Black Swan' case, a former ballerina falls in love with a man 30 years her senior, but when their love story spirals out of control, one of them winds up dead.

Millionaire entrepreneur Lance Herndon is found bludgeoned to death in his Atlanta home. The search for his killer reveals no shortage of suspects or secrets.

Andrea Canning reports on the dramatic updates in the case of international fugitive Nicholas Rossi who faked his death as law enforcement closed in on him for alleged crimes of rape and fraud; will the man with multiple identities finally face justice?

After Gary "Big Daddy" Farris mysteriously disappears, his family discovers his remains on their sprawling 10-acre estate. An investigation reveals a family deeply divided by jealousy and greed, but did one of them kill Big Daddy?

When Rob Limon is murdered at work, the investigation uncovers deep secrets about sex, friendship, religion and family; the broadcast explores the case featured in its chart-topping podcast "Deadly Mirage."

Bob Lee was a well-known tech visionary whose sudden and brutal death in 2023 left the tech world in shock. Family, friends, attorneys, police, and colleagues from the tech industry speak out exclusively to Dateline’s Josh Mankiewicz about the case.

30 years later... On October 25, 1994, Susan Smith reported that her two young sons had been taken by a carjacker. Everyone was looking for the two young brothers. For nine days, hearts went out to their poor parents. What came next was unimaginable.

The high-profile case of two murdered Indiana teens takes a stunning turn after video of the killer, taken by one of his victims shortly before their deaths, is revealed.

On Friday the 13th, 25-year-old Chantay Blankinship doesn't come home from her usual walk around the neighborhood. Two days later, searchers make a gruesome discovery at an abandoned farmhouse that locals call the Haunted House. When all leads dry up, investigators turn to a unique forensic DNA tool, which sparks a shocking confession during a church service.

Lori and Chad Daybell were both convicted in separate trials for the gruesome killings of two of Lori’s children in 2019. Now, Lori breaks her silence in a shocking new interview from prison.

In 2013, Desiree Sunford is found murdered in her Yakima, Washington, home. The case, which begins with what seems to be a simple burglary, spirals into a complex investigation exposing a tangled web of betrayal, deception, and fatal obsession.

Kaitlyn Conley was convicted of manslaughter in 2017 after the death of Mary Yoder by poison. Conley maintains she is innocent and continues her fight to overturn the conviction.

Mike Sisco and his fiancé Karen Harkness are found shot to death in their Topeka duplex in 2002. A years-long search for the killer and three criminal trials over two decades reveals strained dynamics within one victim’s family.

On July 18, 2018, Mollie Tibbetts, a 20-year-old University of Iowa student, disappears while jogging near her home in Brooklyn, Iowa. Investigators discover security camera video that reveals a critical clue.

Celebrity hairdresser Fabio Sementilli is brutally murdered in his backyard. A security camera helps investigators identify unlikely suspects and an illicit affair.

22-year-old Jasmine "Jazzy" Pace, a young Tennessee woman, mysteriously vanishes and misses her family's Thanksgiving dinner. Determined to track her down, her family takes matters into their own hands, pursuing every digital clue she left behind. What begins as a missing persons report evolves into a disturbing and calculated murder investigation.

A West Virginia pharmacist is left widowed after her husband, 38-year-old Michael Cochran, suddenly dies. Their close-knit neighborhood rallies around the family until troubling details emerge regarding the couple's new business venture.

College student Anita Knutson is found stabbed to death. The case took years and the unwavering commitment of loved ones and investigators to reach a resolution.

Simeonette Mapes-Crupi, a beloved Staten Island teacher, is found dead in the home she shared with her husband.

In the early morning hours of November 13, 2022, four University of Idaho students were killed in an off-campus rental house on King Road in Moscow, Idaho. See never-before-reported evidence, including video, photographic, and digital materials that investigators say track accused killer Bryan Kohberger’s movements.

Correspondent Josh Mankiewicz reports on the charges against Combs, which include a five-count federal indictment for racketeering and sex trafficking.

Andrea Canning reports on the verdict in the retrial of Karen Read in Dedham, Massachusetts.