When a retired detective from the Jacksonville Sheriff's Office, is found beaten and shot in a local cemetery, it will take covert surveillance and an undercover sting to bring his killer to justice.

At first, the fatal shooting of Linda Marie Brown seems like an open-and-shut case because her teenage stepdaughter, Cinnamon, is found comatose nearby clutching a suicide note.

The partially clothed and badly beaten body of a teenage girl is found hidden near a popular hiking trail.

A multimillionaire real estate mogul has been missing for three weeks when a bullet-riddled skull is found in the Nevada desert; Las Vegas homicide detectives quickly discover that the missing man is no angel.

When a women is found in a pool of blood on the bedroom floor, investigators learn just a few months before her death, the FBI had warned the victim someone had tried to hire a hit man on the 'dark' web to kill her. But there's more to this story.

A couple is found bludgeoned to death in bed, and investigators learn the woman's toddler has witnessed the entire thing.

After a lawyer is found brutally beaten and stomped to death in an alley, detectives are faced with a daunting puzzle that includes theories about prostitution, clandestine groups and contract killing.

When three lifeless bodies are found in the back of the coffee shop, police rule it out as a robbery gone wrong, but there are still too many unanswered questions.

Detectives are presented with an unusual problem after dozens of people witness a deadly attack, but no one can identify the gang members involved.

People fishing in a London canal are horrified when they reel in an old gym bag containing a collection of dismembered human body parts; police realize they have serial killer on their hands who may have been murdering women across Europe for years.