Women in a small Louisiana city live in fear of a rapist who leaves no clues to his identity. But computer technology and behavioral science combine to give police a new forensic tool: geographical profiling.

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When a woman is found murdered in a bar. Investigators believe the best evidence is the bite mark found on the victim. A postman is convicted of murder, but he maintains his innocence. Ten years later, improved technology yields new information.

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Children at a Texas hospital seem to be dying at a higher rate than at any other US hospital. Investigators look to a suspicious nurse.

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A girl was found dead in her backyard. Her parents claimed she was attacked and killed by the family dogs, but police disagreed.

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When a mother and her child are abducted during a carjacking, the crime is reported within minutes. Police know they have a small window of opportunity to find them... and the clock is ticking.

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Arson is suspected when a Seattle policeman's house burns down.

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When a young mother and her infant son are found dead in a cornfield, the obvious suspect is the husband and father of the victims. But some insects found on the bodies reveal a vital clue, as does a long, blonde hair found on the victims.

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A talented television news anchor was shot to death outside her home; it appeared to be a crime of passion, perpetrated by an obsessed fan. A police dog tracked the scent of the killer through the adjacent woods and back to the crime scene. Could the murderer be one of the onlookers, watching the police conduct their investigation?

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When their trailer catches fire, the young husband heroically rescues his wife and infant son. A month later, his wife is beaten to death in a bedroom of his parents’ home. The cut window screen points to an intruder, but the lack of supporting evidence compels investigators to look beyond the obvious. 

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Two years after a girl was murdered, a tiny drop of blood and burned bones lead police to her murderers.

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