It was a mystery from day one: A young father’s life cut short. Matt Podolak's death was puzzling. The word poison kept coming up. Matt’s brother embarks on a long quest for the truth.

Police are perplexed when they find the body of a young woman but are unable identify her; with the help of amateur investigators and new DNA technology, a dogged investigator finds her killer and her identity.

When a model and up-and-coming YouTube celebrity is found dead in their pool, police question her husband see if he can provide any answers.

It is common for long-haul truck driver Lloyd Ford to be gone for stretches, and when he disappears, it doesn't raise many flags; at least two people know where he is, and they guard the secret for 27 years, but the truth is about to be revealed.

Keith Morrison reports on a dramatic undercover operation in Palm Beach, FL, to save a wife and mother who has no idea she is in danger.

Oscar Pistorius shoots and kills his girlfriend just eight months after competing in the London Olympics, telling police that he believed she was an intruder and that he was acting in self-defense.

A 40-year-old Minnesota wife and mother, Janet 'Jan' Kruse, is shot to death in her bed while her husband Chris and teenage daughter Bailey are home, leaving investigators to wonder who would want her dead.

College student Jesse Valencia is found murdered in a residential neighborhood in Columbia, MO; the police search for the truth, and they are stunned to learn that one of their own might be involved.

When Idaho police retrace the final hours of 16-year-old Cassie Jo Stoddart in 2006, they uncover evidence including a homemade horror film that points to her killers. Keith Morrison reports.

When a U.S. Air Force Airman is shot multiple times inside his garage, a trail of clues leads Las Vegas detectives to a secret love affair and a murderous plan.

Private Investigator and former police officer Taylor Wright vanishes, but detectives think there is more to the story after her girlfriend receives strange text messages from Taylor's phone.

After the cause of the death of Stacy Feldman in her Denver home is ruled as undetermined, friends and family join forces to piece together what happened. Insiders close to the case speak out about the seven-year battle for justice.