Sixteen-year-old Selena Stoian is left to piece together what went wrong with her family in such a short period of time when she finds her mother, Maria, dead and father, Stefan, missing.

A trail of death follows a couple intertwined in love, secrets and partnership; dark and mysterious questions loom after a new life begins thanks to a stolen identity.

Bob Angleton, a bookie and police informant, is twice charged with killing his wife in a Texas tale of double crosses, adultery, blackmail, and murder.

A socialite is murdered in Memphis, Tenn., leading investigators to question suspects who have become ensnared in a tangled web of money, drugs and revenge, but the answers to this mystery may lie closer to the crime scene.

In Kirkwood, Mo., Charles Lee "Cookie" Thornton declares war on city hall, killing two police officers and four city officials, including the mayor.

Millionaire Marjorie Nugent is found dead in her freezer.

In Canyon Lake, Calif., a serial killer targets women, then the killer is finally caught, and no one can believe the face or motives behind the cold-blooded murders.

After Laura Miller vanishes, police find her remains along a Texas highway where more than 24 other young women have turned up dead for over three decades.

The terrifying and macabre story of Kraig Kahler who killed his family a few days after Thanksgiving in 2009.

Fishermen make a gruesome discovery in the Florida Everglades, unleashing a mystery about a woman, a mobster and a murder.

In Bloomington, Ill., a woman and her three children are murdered; authorities delve into the mystery of who committed this heinous crime which points close to home, but all is not as it appears.

In Syracuse, N.Y., Jeff Cahill beats his wife, Jill, to within an inch of her life with an aluminum bat, then he sneaks into her hospital room and murders her.

Sharon Marshall dies in a suspicious hit-and-run accident, leading investigators to uncover a sordid tale of kidnapping, child abuse, murder, and false identities.

A young woman who has good looks, brains and talent is found murdered, leading to the discovery that she has been leading a double life.

A young woman is found beaten to death. Her coworker is found bound and bleeding. Detectives begin hunting for two masked men described by the sole survivor. But the evidence takes the investigation down an unexpected path.

Dr. Amy Bishop shoots and kills three of her colleagues after being denied tenure, then investigators learn Bishop killed her brother with a shotgun 24 years prior, prompting many to ask if the tragic deaths could have been avoided.

Investigation Discovery has made a home for award-winning investigative reporting from all three major broadcast networks. Joining CBS News' "48 Hours" and "60 Minutes" and NBC News' "Dateline," "20/20 on ID" delivers a collection of stories about ordinary people facing extraordinary circumstances. It's hosted by ABC News correspondent John Quiñones, and features the reporters of ABC News' acclaimed series "20/20" who dig beneath the headlines to reveal stories of victims, their families, and the search for truth and justice.

The hourlong broadcast includes insightful interviews with notable figures from the worlds of news, politics and entertainment, hosted by David Muir and Amy Robach. A revolving team of journalists from ABC News also contribute investigative stories.

"Dateline" has been a staple of the newsmagazine genre since premiering in 1992. Given how long it's been on the air, the show has an extensive archive of in-depth news stories and investigative journalism. This syndicated version offers viewers another chance to watch some of the show's previous content, serving up real-life mysteries and in-depth investigations from the show's 20-plus years on the air. Cases involving murders and missing people are frequent topics on the series that has won multiple Emmys in the news and documentary category.

Anchored by Lester Holt, "Dateline" is NBC's signature newsmagazine, bringing viewers storytelling at its best by putting the pieces together to present the full picture of real-life events. NBC News correspondents cover compelling stories and issues of the day, ranging from mystery and crime to in-depth investigations and breaking-news events.