The town of Fort Smith, Arkansas, is left reeling when a retired schoolteacher is found bludgeoned to death, struck with a hammer no fewer than 36 times.

After four women vanish and their cases go cold for decades, Texas Ranger Jim Holland must bond with a serial killer to pry loose the truth.

A shooting in Mississippi leaves a man fighting for his life. Police use gunshot detection technology to track the shooter before he strikes again.

In 2012, Dr. Joseph Sonnier is found murdered in his Texas home. Who would want to kill a well-known and beloved doctor and father?

When Texas boxing gym owner, Jimmy Sims, is shot in his driveway, his wife accuses Jimmy's mistress of the crime - but is it just a ruse?

When a young woman's body is found 200 miles from home, a retired police detective uses his podcast to crowd-source the search for her killer.

When a popular 14-year-old boy goes missing, people in the neighbourhood seem to know what happened. Why won't they go to the police?

Police turn to surveillance footage to learn about the last moments of a woman whose burning corpse was found outside Atlanta - and find her killer.

The daytime shooting of an Ohio man confounds Silverton police until security video surfaces. Was a broken heart at the centre of this violent act?

Bobby and Sherilyn go missing in Oklahoma backcountry with their little girl, leaving their dog abandoned in the car. Is the family lost or is this a murder-suicide?

Liz and John vanish after meeting with their accountant who they suspect of embezzling funds from their yachting resort. Could he be responsible for their disappearance?

In the Atlanta suburbs, a pregnant mother and her fiancé are kidnapped on the night before their baby shower. Soon after, the fiancé's family receives ransom calls.

In Rison, Arkansas, a young woman is abducted from her home in the middle of the night. When officers find her body, they uncover a horrific murder plot.

In Virgina, the Pentecostal church is known for bible studies and youth groups. Behind closed doors, envy, greed and lust take over the congregation.

Workouts turn a group of fitness fanatics into bitter rivals. As the competition heats up, it's not just buff bodies and tight abs on the line.

When a night out ends in bloodshed for 23-year-old Navy veteran Raul Mendoza, Houston police have many questions. But a tip from his sister could hold answers.

A party in the woods ends in tragedy when the body of 18-year-old Jarret Clark is found in a lake. Will a surprise witness help solve the murder?

Steve and Amy are in Wymore, Nebraska, to help a woman who believes paranormal activity has taken control of her husband. What will they uncover?

Kesha and rapper GaTa check in for a night of terror at the Westerfeld House. Is illusionist Harry Houdini responsible for the electrifying paranormal activity?

Demon hunter Tim Wood investigates powerful poltergeist activity in an abandoned Texas hospital. His team employs a dangerous experiment to trap the entity there.

Reports of vengeful spirits, paranormal energy, and a sordid history including death and murder, drive John and Chad to the historic Wheatlands Plantation.

Rumours of forgotten lead John and Chad to search for a doorway to another world at one of America's most dreaded asylums: Springfield State Hospital.

Kesha and rapper GaTa check in for a night of terror at the Westerfeld House. Is illusionist Harry Houdini responsible for the electrifying paranormal activity?