A fire leads investigators to reexamine an unusual death.

A young woman's naked body is discovered in a remote area leading forensic investigators on a search for clues to her identity and the identity of her killer.

When a Yale student mysteriously vanishes days before her wedding, investigators comb a secure research lab for clues.

A suitcase leads to the gruesome discovery of a nearly perfect crime.

A young mother is murdered in a crowded parking lot in broad daylight.

A popular handy man in a New Hampshire town is found murdered and investigators follow forensic clues to a shocking conclusion.

A serial killer terrorizes a small Texas town.

A mysterious murder in an upscale community is solved by cellphone forensics.

After the brutal slaying of a young couple on a road trip, the victims' families begin receiving disturbing letters.

The unexpected and strange death of a health conscious woman prompts an investigation.

After a young mother is found brutally murdered in her home, investigators find startling clues on her cell phone that could lead to her killer.

An amazing new forensic tool turns a cold case around.

A gruesome find in a small town church sends investigators searching for a killer.

An insurance agent is shot execution style in his office, but the killer leaves no fingerprints, and there is no murder weapon found at the scene; then investigators discover a critical clue invisible to the naked eye that cracks the case.

A healthy young mother mysteriously dies after a minor traffic accident triggering an investigation.

Investigators search for clues after a body is discovered in a watery grave.