A healthy young man dies mysteriously in his sleep, and toxicology tests reveal a lethal dose of lidocaine in his blood. Investigators find a suicide note and presume he killed himself until a forensic linguist examines the note.
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When 23-year-old Tina Biggar goes missing, her boyfriend and family fear she has been murdered.
Detectives believe a murder is solved when they find the weapon and victim's blood in a man's flat.
The tests of a plant pathologist and a dendrochronologist lead to a surprising revelation.
Friends see a woman in the back of a car flailing her arms, not realizing she is being abducted.
A squashed tomato and a pinpoint reflection of light in a photo help catch a killer.
A man denies killing a pedestrian in a hit-and-run, claiming he sold the car in question.
Photographs found in a dumpster lead to the killer of a model.
Police are puzzled about a murder until a frozen river five miles away provides a breakthrough.
Ten years after the murder of a rock singer, scientists use evidence to bring her killer to justice.
When a man is gunned down in his own garage, police discover that a wound sustained by the grieving widow may have been self-inflicted. They turn to science to help unravel a twisted tale of lust, greed and deception.
When the mail-order bride of a former army sergeant goes missing, investigators look into the deaths of the man's previous two wives.
An American tourist is murdered in cold blood while at a Mexican resort.
Investigators hope tiny paint chips and shards of plastic lead them to a hit-and-run driver.
Police are stumped in hunting a serial killer in 1957 until new technology help solve the crimes.
A human skull retrieved from a watery grave reveals a ghastly crime.
A man's wife kills herself 14 years after his college sweetheart commits suicide.
Details don't add up when police suspect a young woman committed suicide.
A flawed envelope is an unlikely clue to identifying a killer who laced a water cooler with cyanide.
In 1988, a patient died unexpectedly in the office of California neurologist Richard Boggs.
In 1962, the people of the small town of Hanford, California, lost their sense of peace when one of their own, 15-year-old Marlene Miller, was murdered.
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