A young college student is found dead in her apartment. There are no obvious signs of foul play, but skin cells under her fingernails yield DNA of an unknown male suspect, and petechial hemorrhages in her eyes prove this is a homicide.

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A 12-year-old's death shakes a suburban Minnesota town. Police have no leads until a string of burglaries months after the murder leads them to the victim's possessions, and to the killer.

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After a day of fishing in a small village in Switzerland, a teenage boy did not return home as planned. His body was found in a cornfield, but investigators found microscopic one-cell organisms on him, which could only be found in water.

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In 1993, worldwide attention focused on robberies which targeted tourists in Florida. Some vacationers were killed in thee attacks; some fought and survived, despite severe injuries. A bite mark is the key used to convict a suspect.

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A pregnant woman is brutally attacked in her own home and her unborn child is killed. Was her husband wrongly convicted?

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The truck fell off the hydraulic jack, crushed the man working beneath it, and sparked a fire... or so it seemed. Investigators turned to forensic science to determine if they were dealing with a tragic accident or a carefully orchestrated murder.

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A funeral director is murdered and his son, the sole beneficiary of his estate, is considered a likely suspect... until witnesses provide him with an ironclad alibi. When police find a mask near the crime scene, they hope it will lead to the killer.

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Orange fibers may link a van and a murdered girl's body.

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Three homicides on two continents look like professional executions. Investigators on both sides of the Atlantic needed to find out if they were related and, if they were, who or what they had in common.

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The woman was missing for a month. Police find her car but no evidence of foul play... only a fingerprint and a set of keys. There's a code on one of the keys, which they hope will unlock not only a door, but also the mystery of her disappearance.

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