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.

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.

Linda Watson is a single mom raising a beautiful daughter when she disappears; then, suddenly, Linda's mom goes missing too, along with another friend; police are convinced the three cases are connected, but unraveling the mystery takes years.

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.

Flight instructor Kelsey Berreth vanishes after she was last seen grocery shopping with her daughter on Thanksgiving in Woodland Park, CO; the case makes national headlines, but the secret behind Kelsey's disappearance is lurking much closer to home.

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.

Eleven years after Waterbury, CT mother Donna Palomba is raped in her home while her children slept in 1993, investigators finally track down her attacker. Donna speaks out about the case, including her fight to keep her assailant from walking free.

In Stephenville, TX, in 1987, Susan Woods doesn't show up for work for 2 days; she is discovered by her father dead at home in her bathtub. As police search for answers, they find a trail of victims - men associated with Susan, including her estranged husband living in Indianapolis. But the case wasn't solved for almost 2 decades.

A Blairsville, PA man, 39-year-old dentist and father Dr. John Yelenic, is convinced his messy divorce put a target on his back. When he's found stabbed to death in 2006, his friends and family realize he was right all along in predicting his own gruesome murder.

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.

Detectives in Washington, D.C., discover a puzzling connection between two women who disappeared two decades apart. An investigation reveals a sinister secret hidden along one of the busiest stretches of interstate in the country.

27-year-old Egypt Covington is found murdered in her home. Investigators in Michigan quickly identify a person of interest, but years pass without an arrest.

A family begins a relentless pursuit of justice after the death of Nevada attorney Susan Winters is ruled a suicide; Susan's parents open up about the 7-year case and their efforts to push back against the criminal justice system.

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.

After Florida teacher Denise Hallowell is found murdered in her home, investigators examine her family's tumultuous past in their desperate search for a killer.