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

When investigators respond to a bloody quadruple homicide, they soon discover the murders involved torture, revenge, and even Satan.

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 man calls 911 claiming he found his ex-girlfriend dead. But his behaviour on the call leads police to wonder if he could be involved.

When a fundamentalist polygamous Mormon is found dead, the murderer must be found. With seven wives, everyone is a potential suspect.

John joins the hunt for a woman who allegedly hired a hitman to murder her husband. Later, Cal pursues a man accused of killing the lawyer who was suing him.

John joins the hunt for the alleged killer of a young woman in broad daylight. Later, Cal's in San Diego to help track down man who allegedly ensnared over 100 women.

Beautiful Elisa Redelsberger seems eager to start a new life when she meets soft-hearted lawyer, Larry McNabney. But then she pulls off the ultimate disappearing act.

Betty Lou Lazarra's beauty gave her an advantage in life. But when this single mom meets wealthy businessman, Al Haber, she won't rest on her looks alone.

A community is left in shock when a well-liked father is found brutally murdered in his own bed. How will police get on the trail of an unlikely murderer?

When an aspiring entrepreneur suddenly vanishes, investigators launch a frantic search. Was she harbouring dark and violent secret that got her killed?

When a fundamentalist polygamous Mormon is found dead, the murderer must be found. With seven wives, everyone is a potential suspect.

When Dustin's two women cut him out of their bedroom fun, there is bad blood. And when one of the ladies goes back to him, the scene is set for murder.

Between 2005 and 2009 eight young women were found dumped around Jennings, Louisiana. The cases are still unsolved, but new evidence leads to a surprise arrest.

When 18-year-old Misty falls in love with a man nearly 15 years her senior, her parents warn against the relationship. But no one could predict the danger she is in.

When Judy and Duane meet they both long for excitement and they take their secret affair on the road. But soon the sparks between them spiral out of control.

On the Dean case, phones are examined for communications between persons of interest. On the Woodson case, is the suspect's family hiding something?

Veteran homicide detectives and forensic experts uncover new leads and bring new life to Tulsa County's old and mishandled cases.

Marty Etchemendy accepts a ride with strangers, but he never makes it home. Detectives race to find Marty and those who ripped him from his family.

When Theresa Dalessio is shot dead in her home with her family nearby, the town of Plumville, Pennsylvania, is shocked. As evidence emerges, suspects are revealed.

When a twenty-eight year old schoolteacher is murdered in NYC in 1973, detectives immerse themselves in the swinging world of 1970s nightlife to find the killer.

Las Vegas teen Wendy Mazaros survives sex trafficking and marries her older boss, Tom Hanley - only to discover he is involved with the mob and might be a hitman.

Single mother Brooklin meets a gorgeous guy online. Despite many red flags, she marries him and is soon alienated from family and close to financial ruin.

A pair of teenage sweethearts seem to be happily married, with four children and an adventurous life together. But the couple is harbouring a dark secret.

When Gabby Petito goes missing on a road trip with her fiancé, the mystery goes viral. New footage sheds light on their struggles that led to the nightmarish outcome.