Dateline: Secrets Uncovered

Newlywed Dalia Dippolito returns home from the gym to the awful news that her husband had been killed; in a case where almost nothing is as it seems, investigators want to know if Dalia is diabolical or an unwitting pawn in a hoax gone wrong.

When the dashing Gavin Smith vanishes, LA detectives are unsure if they are investigating a crime or a suicide; his wife claims he had gotten lost in drugs and flings; police wonder if the key to finding Gavin is hidden in one of those affairs.

Ashlea Harris has no shortage of admirers, so when she is found dead after a suspicious fire consumes her apartment, police are baffled; the fire is no accident but the clues to who killed Ashlea may be up in smoke.

Brandy Daniels believes someone is stalking her, then the single mother is found slumped over in her car, shot dead; investigators spend years navigating the twists and turns searching for her killer.

Debra Newell thought she found Mr. Right but her daughters sensed something wrong about John Meehan; they started digging into his past and their search for answers exposed a dangerous con man.

Heidy and Conrad Truman are an enviable couple with a bright future until Heidy is found shot; in the aftermath, fingers are pointed but could be aimed at an innocent person.

When a woman's body is discovered at a trash facility, a detective makes a promise to her mother to get justice; she doesn't know she will come face to face with a serial killer.

Wealthy residents feel safe in their gated community but it is not safe for one millionaire, murdered in his waterfront home; police investigate but the case grows cold; turns out the key to solving it, or two keys, are right at the front door.

The save the date cards had gone out. Angie Ver Huel went to sleep next to her fiancé, Justin Michael, with big dreams but woke up to a nightmare. Someone was running from their bedroom and Justin was dead. Why did the killer target him, sparing her?

A beautiful, popular graduate student is shot outside her apartment in Durham, North Carolina. Who would want her dead and why?

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.

This episode has no summary.

After finding his wife and two children dead in his garage, a former Indiana state trooper spends 13 years trying to clear his name.

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