Three people were shot dead in a small Texas town, including two respected prosecutors. A clue that would connect the dots remained a mystery until an eagle-eyed investigator made a stunning discovery.

A cold-blooded serial killer was lurking in the woods, stalking his next victim. As Det. Bernie Nelson investigated, puzzling evidence led him to more questions until one clue helped crack the case wide open.

Det. Bill Clark was investigating a disappearance when a trail of clues led him to a young film director. Clark worried that the mystery was a hoax staged by a master storyteller. Turns out the script was much darker.

Days after Lauren Giddings vanished, her body is discovered steps from her apartment.

A murder exposes a tangled web extending from the Pacific Northwest to the North Dakota oil patch.

A beloved dad is murdered in his garage; evidence at the crime scene leaves a puzzle for police.