Puzzling clues and odd witness accounts create huge challenges for investigators trying solve a young girls murder. Will finding lost evidence be the key to identifying her killer?

A young mother vanishes, leaving behind nothing but puzzling clues and disturbing questions. Will a needle in the mud reveal the truth behind her disappearance?

As police try to solve a disturbing homicide, each step of the investigation reveals another layer in a spiderweb of tragedy.

A murdered teenager's body mysteriously turns up in the rural Iowa countryside; the smallest clue could be the key to bringing her killer to justice.

A college co-ed disappears, and her family launches a desperate investigation to find her. What they discover will change their lives forever.

The search for the man who murdered a single mother might lead police to the perpetrator of a second brutal crime with chilling similarities.

The baffling murder of a young woman leads police to two potential suspects: her new boyfriend and an obsessed stalker.

Police try to solve the murder of a woman found in someone else's home.

A romantic Valentine's dance leads to a terrifying abduction and murder.

After a loving mother is murdered inside her own home, police focus on their two best clues -- a blood-stained hammer and a dusty footprint.

Police find a giant sword bent in half, alongside a victim who has been savagely murdered. Investigators must sort through the details of his complicated life in order bring his killer to justice.

A man discovers the body of a young woman in the passenger seat of her car.

A beautiful young woman turns up savagely murdered in a bar parking lot; as investigators retrace her last known steps, several suspects with possible motives come on their radar.

As police investigate the gruesome murder of a mother and child, they realise all the evidence indicates the killer was someone the victims knew and trusted.

Investigators must overturn a shocking decision before they can solve the hauntingly familiar murder of a teenager.

A female active-duty soldier dies in a brutal attack during a night out with members of her unit; police try to determine if a secret fear she mentioned to her mother is the motive for her murder.