Shortly after daybreak in Vancouver, British Columbia, a fire was set in a dumpster. No one saw either the arsonist or the fire, and it burned for hours in the deserted parking lot.
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A Michigan State University grad student disappeared and was presumed dead. With the help of a professor of geological sciences, police hoped to get the "dirt" on her killer.
Seattle police had no suspects in the violent murder of post-grunge singer, Mia Zapata. More than a decade passed before the evidence could be used by forensic scientists to identify the killer.
When a dedicated, well-respected teacher disappeared, police had to determine if she'd gone on vacation without telling anyone, or if she was the victim of foul play.
It was one of the most unusual cases in forensic history. Investigators had to find a way to solve a murder case with evidence which consisted of a squashed tomato found at the crime scene.
Security cameras in a casino tracked a young woman's movements until shortly before she disappeared. She was never seen again.
A fireman died from what appeared to be heart disease, but his family was skeptical of the cause of death.
It's usually easy to determine how a criminal entered the crime scene. But in this case, it was far from clear. It looked like the killer vanished into thin air...and perhaps he had.
Police arrested a suspect for the death of a girl. But new technology proved the wrong man was behind bars.
For twelve years, the murder of a young woman went unsolved, but with the passage of time came the development of technology. Could a used tissue found at the crime scene give police the evidence they need to bring a killer to justice?
In one of the most brazen crimes of the 20th century, the chairman of the Coors Brewing Company was kidnapped.
A millionaire and his family were executed in their own home. For three years, the murders went unsolved. Finally, a box of ammunition and some fluorescent fibers revealed the ultimate betrayal.
In 1996, Derrick Duehren returned to find his Oregon home burned to the ground. His wife's charred remains were later found in the rubble.
In 1997, Kelly Eckart's car was found, with her belongings still in it, after she worked a late shift in Franklin, Indiana. Days later, her body was found in an isolated ravine.
When a wealthy socialite died after falling down the stairs, witness accounts contradicted evidence. Investigators employed a physicist and an expert in accident reconstruction.
A lifelong resident of the tiny town of Lefroy, Tasmania was murdered outside his own home. Robbery appeared to be the motive, but with no suspects, the investigation came to a halt.
The victim had ingested a massive amount of cyanide. An unlikely clue - a flaw on a mailing envelope - exposed a murderer who was willing to kill innocent people.
The wife of a respected police officer was murdered in her own home. The crime went unsolved for more than a decade, until a newly formed cold case unit took a fresh look at the evidence.
When the number of bloodstains at a scene were abnormal, it was up to forensic scientists to find out why.
A girl claimed she had been abducted. She recounted what happened but things didn't add up to police.
A bomb, constructed to cause as much damage as possible, kills a victim with deadly force and flame. When a search yields some tiny clues, police are able to identify the killer.
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