Internet searches suggest a teacher knows a lot about his wife's death. A husband agrees to his wife's unusual request. Plus, a Star Wars fan turns to the dark side.

Debra sees the darkness in her young brother's eyes, but she doesn't yet know he is a deviant predator and serial killer.

When Marilyn Sheppard is found beaten to death in her bedroom in 1954, it will take more than 30 years to piece together the truth of what happened.

Internet searches suggest a teacher knows a lot about his wife's death. A husband agrees to his wife's unusual request. Plus, a Star Wars fan turns to the dark side.

When Tyarra Williams vanishes, tips suggest she may have fallen prey to human trafficking. Does someone in the community know more than they're letting on?

When 42-year-old Trudy Darby is murdered, and two more local women go missing police fear a serial killer. But a surprising call reveals the true culprits.

23-year-old Sherry Leighty disappears without a trace. The Police take over the investigation and finally uncover a dark secret leading to a shocking discovery. PREMIERE

When three women die of the same mysterious illness, the hunt is on to prove their deaths were no accident. Can detectives unravel this twisted tale of deceit?

When a man's body is dumped in a cemetery, the trail leads detectives to question two very different sisters. How are they linked to this mysterious murder?

A US soldier meets harm in Upstate New York, and his killers may have been his fellow GIs. A missing man's haunting voicemail is his final clue.

The dismembered body of a missing woman turns up in trash bags. A detective's pursuit of the suspect prompts the question: Could this man be a serial killer?

When Tyarra Williams vanishes, tips suggest she may have fallen prey to human trafficking. Does someone in the community know more than they're letting on?

When 13-year-old Tabitha Tuders vanishes, police suspect she's a runaway. But disturbing circumstances behind her disappearance leaves her family desperate for the truth.

Tracy Fortson was the first female deputy sheriff of Oglethorpe County, but was convicted of her boyfriend's murder. Was she framed?

When Kathy Middleton died of a gunshot in her own home, police suspected her husband, Ken, killed her. His family insists he was wrongfully convicted.

A girls' movie night leads to a tragic ending for a group of college roommates. Police trawl halfway across the state in search of the killer. PREMIERE

A murder within a small square-dancing community in Texarkana, Arkansas leads to suspects with possible motives including love triangles, jealousy and money. PREMIERE

Former police chief Clay Bryant finally gets the chance to solve a haunting cold case from his childhood that his now late father was powerless to fight.

In 2013, 22-year-old Amber Bass was shot dead in her own driveway after a night out. Was this just a random act of violence or was a jealous lover involved?

When Sharon Robinson's body is found outside New Orleans, her abusive corrupt police officer boyfriend is a suspect. But had she been involved in a bigger crime?

When a reporter receives a mysterious phone call from a murderer who threatens to kill again, police race against the clock to try to save the town's girls.

Diamond begins her 25-year sentence. Katie goes before the parole board. A new arrestee suffers from heroin withdrawal.

An angry passenger sets off a fire extinguisher at a busy Atlanta airport. In Texas, cops discover a giant python underneath a car.

Officers call for backup after a renegade DUI granny resists arrest. As party guests hide, cops uncover a surprise in the closet.

A house on Elm Street goes up in flames, leaving two people dead. Police race the clock to catch the killer before they strike again.