A man calls 911 when he finds blood inside a friend’s home. Officers enter to find a beloved community activist shot dead. Detectives piece together clues to find a cold-blooded murderer.

After hunters find the dismembered body of a missing young woman, police uncover a shocking secret that she kept hidden from friends, but blood splatter and incriminating receipts help investigators decode her demise at the hand of a murderer.

After ranchers spot the body of a brutally beaten teenage girl on a riverbank, deputies conduct countless interviews but to no avail; finally, cutting-edge technology helps police lift DNA from the murder weapon and zero in on the killer.

After motorists spot a man's body burning on the side of the highway, investigators find evidence of a brutal assassination and fiery cover-up; detectives decode construction debris with curious details to reveal a scheme that ended in murder.

After a single father is found dead in his burning home, an autopsy reveals he was murdered; investigators must decode ballistic, chemical and digital clues to reveal a complex plan executed by a twisted killer.