Kathy Blair is found stabbed to death in her bedroom in Texas; the gruesome crime scene puzzles investigators until an unlikely clue that is captured in the darkness puts them on the trail of a depraved killer.

A brutal murder of a college student in Vincennes, Indiana, may go unsolved until a second crime puts detectives on the heels of a serial killer. As the investigation deepens, police turn to the killer's shocking pattern of violence for clues.

After the battered body of a young woman is found dumped at a landfill in Lubbock, Texas detectives race to collect evidence hidden in acres of trash. The elusive killer's attempt to bury the truth might hold the key to unlocking the mystery.

Investigators in Prince George’s County, Maryland are chasing the shadow of a brutal killer who is targeting mothers and daughters. The investigation brings them face to face with a predator, unlike anything they have encountered before.

When a free-spirited young woman is found murdered in her kitchen, police in Chicopee, Mass., have no shortage of suspects; detectives realize the clue that leads to her killer is actually hidden in plain sight.

When a single mother's car is found abandoned on a lone stretch of highway in Illinois, detectives are forced to turn to forensic evidence to piece together the secrets of her disappearance uncovering a dark obsession and a deeply personal motive.

Detectives in Florida are working to identify the body of a young woman found floating in a river. The sheer brutality of the murder and endless pool of potential suspects leaves investigators puzzled until they uncover a silent witness to the crime.

Petty Officer Amanda Snell is found dead in her room on the base; NCIS is split as to whether her death was an accident or foul play; her killer's insatiable quest for his next victim brings the shocking truth to light.