Dateline: The Smoking Gun

When Kim Dorsey was found murdered in her bedroom, the chaotic crime scene left more questions than answers; a single out-of-place item would be the key to discovering the killer's identity if investigators could find the evidence.

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 for his next victim. As Detective Bernie Nelson investigated, puzzling evidence led him to more questions until one clue helped crack the case wide open.

When Detective Bill Clark investigates a disappearance, a trail of clues leads him to a young film director; Clark worries that the mystery was a hoax staged by a master storyteller; however, it turns out the script is much darker.

Days after Lauren Giddings vanished, her body was discovered steps from her apartment; to catch her killer, detectives had to untangle a confusing web of clues and find a piece of evidence no one was supposed to see.

The murder of a businessman exposes a tangled web extending from the Pacific Northwest to the North Dakota oil patch; investigators race to piece together seemingly disconnected clues to catch a monster before he strucks again.

A beloved former firefighter is found dead in his garage; a neighbor's home security camera may provide answers.

A 64-year-old man is charged with murder after shooting two unarmed teenagers who broke into his home.