An elderly couple is viciously attacked at their Phoenix home, and the ravaged crime scene points to a gruesome sexual assault. Determined investigators focus on a missing wedding ring, which could be the key to tracking down this diabolical perpetrator.

On Chincoteague Island, a beautiful young mother is murdered steps from a vacant summer home. Detective Danny Plott learns she was lured to her death by a mysterious phone call and soon realizes the killer has been hiding in plain sight.

In Bensalem, Pennsylvania, the long-dead body of a kind natured computer programmer is found submerged in the bathtub of his ransacked house. Leads are scarce until Detective Chris McMullin discovers a series of troubling voicemails.

When a promising young realtor plunges to his death from the 14th story of a trendy Miami high-rise, first responders assume suicide. But Det Joe Schillaci suspects foul play and follows a series of clues to the bloodied body of a second victim.

A Seattle woman is slain steps from an infamous homeless encampment known as "The Jungle". After navigating a set of false leads, Det. Cloyd Steiger connects her case to a pair of unsolved homicides, triggering a city-wide hunt for a serial killer.

Some three miles off the Jersey shore, boaters discover the decomposed remains of a 16-year-old girl, bound in metal chains. Detectives from Delaware and New Jersey join forces to unravel a cold-blooded conspiracy and catch an unlikely killer.

A North Carolina teen's body is found in an empty dirt lot - beaten, blindfolded, and riddled with bullets. To catch an unlikely band of killers, Det. Josh Hamilton must trace a series of mysterious transactions and expose an ugly truth.

The abduction and murder of a beloved young schoolteacher shakes a sleepy New England town to its core. Veteran investigator Robert Cushing is called in to lead the manhunt, but even he is caught off guard by depravity of the killer's plan.

A quiet Maryland town is shaken to its core when a local couple is savagely slain in their bedroom. Det. Joe Bellino wonders if the key to unlocking the mystery lies with the victim's disabled daughter, who bore witness to both murders.

A med student is found pinned to her bedroom floor with a large knife. Suspicions turn to a disarmingly casual 911 caller. But when the caller's alibi checks out, Det Frank Dillard must employ his skills as an interrogator to hunt down a serial killer.