An investigation into the murder of Katie Poirier is stymied by the lack of a body. Finally, investigators use a single tooth found among some charred remains to identify her.
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A young woman suddenly becomes critically ill, eventually leaving her unable to walk. A bone marrow test reveals the cause: arsenic poisoning. Investigators must determine if the poisoning was caused by groundwater contamination or something more sinister.
For seven years, a trio of men robbed one bank after another. They always got away before the police arrived and they left no evidence behind. But the way they stood and the clothes they wore told a story that could be read by forensic scientists.
Investigators sift through the ashes of a fire which killed a 40-year-old woman. The fire appears to have been started by an unattended cigarette. On closer look, forensic scientists discover the cause was far more complicated.
When a talented television news anchor is shot to death outside her home, it appears to be a crime of passion perpetrated by an obsessed fan.
A woman disappears without a trace. Even though foul play is suspected, the leads don't pan out and the trail turns cold. Twenty years would pass before police are able to link a clump of hair discovered in an isolated area with the missing woman.
An Alaskan police officer finds a woman's body while on routine patrol of a public park. During the autopsy, the medical examiner preserves the portion of her rib cage which sustained the fatal wound.
A woman is killed while walking her dogs in the woods. Since she has no enemies and her husband has an alibi, police assume it's a hunting accident - until they find a strange letter, allegedly written by the woman before her death.
Police investigate a discarded sleeping bag containing bloody sneakers and a purse, which eventually leads to the body of a young woman. A mark found on the victim's body enables police to track the killer.
A fire erupted in Kings Cross Station, killing 31 people and injuring dozens more. Investigators pinpointed the cause of the fire with state-of-the-art technology.
In 1993, the Amtrak Railroad experienced the deadliest train crash in United States history when the Sunset Limited derailed while crossing Alabama's Big Bayou Canot bridge.
On the way to Yosemite National Park, a car carrying three Secret Service agents collided with another car.
A computer crash pushed a manufacturing company to the brink of collapse. Investigators must determine if the crash was the result of a sabotage.
A teen was killed by her parents in what they said was self-defense, but forensic evidence told otherwise.
A high school gym teacher gives his friend a ride home but never returns his wife and friend receive letters saying he started a new life, but they suspect foul play despite no body being discovered.
For six years, a serial killer prowled NYC. He wrote letters to police indicating he would kill twelve people.
Just weeks before a witness is to testify against the man accused of sexually assaulting her, she is murdered.
When an 11-year-old girl disappeared from a small town in a remote area of Alaska, investigators wondered if she'd been attacked by a bear or become lost in the dense woods.
A woman is found dead in a ravine, but crucial crime scene evidence had been washed away by severe thunderstorms. Almost 20 years later, an old hat brought the killer to justice.
A woman who suffered from mental illness is found dead. Was it due to natural causes, suicide or murder?
Police are dispatched to the scene of a shooting, and discover the victim's husband is one of their own: a homicide detective who says his wife accidentally shot herself in the head.
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