An in-depth look at the journalists who exposed the dangers of cult leader Reverend Jim Jones; interviews with witnesses to murders carried out by Jones' followers.

A community comes together to search for a young woman who goes missing from a Halloween party.

A young father's murder at work leads investigators to deep secrets about sex, friendship, religion and family.

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

Former USA Gymnastics national team coordinators Bela and Martha Karolyi talk with Savannah Guthrie about the Olympic sex abuse scandal; Olympic gold medalist McKayla Maroney describes the sexual assault she endured.

The disappearance of a young woman from Bend, Ore., leads to an intense manhunt after the suspect embarks on a two state crime spree.

A woman's death is initially ruled a suicide, but when a new investigation begins, police begin to suspect murder.

Former DEA agent Andrew Hogan details his search for Mexican drug lord Joaquín "El Chapo" Guzmán with never-before-seen videos and photographs.

Four families that barely escaped the catastrophic Montecito, Calif., mudslides alive, and the rescuers who risked their own lives to help.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out that may hold the answer to her disappearance.

In a suburb of Toronto, a family lives in fear as one relative after another is found dead over the years in the same house.

A woman's DNA test sends her father halfway around the world to confront his past.

A woman whose ex-husband killed six people in Arizona, allegedly targeting individuals with connections to their divorce; interviews with experts on the topics of domestic violence and mass murder.

A love triangle leads to years of stalking, property destruction, threats, and murder.

A comprehensive look at the 1989 murders of José and Kitty Menendez by their sons, Lyle and Erik; featuring interviews with key players in the case, including Lyle Menendez.

When a complicated Texas love triangle ends in murder, a pink gun leads to an arrest, until new evidence prompts investigators to rethink the case.

When a young woman is found dead in a field on the outskirts of Green Bay, Wis., a fitness tracker helps detectives solve the mystery.

When two mothers meet after one of their sons disappears after a college party, their search for answers leads them down an unexpected path.

When a model and up-and-coming YouTube celebrity turns up dead, police question her husband in the hope he can shed some light on the situation.

An investigation of a woman found murdered in Fort Worth, Texas.

A popular high school student is found murdered in her bed; two students help police solve the case.

As a murder victim's sisters dedicate themselves to finding the killer, an unexpected source turns the case upside down.

An anonymous letter leads authorities investigating the poisoning death of a chiropractor to an unlikely suspect.

A small-business owner and his bride are murdered shortly after their wedding; police suspect a family feud is the cause.

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.