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.
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While investigating an apparent overdose suicide, detectives recover incriminating files from a computer.
Discovering that an assault suspect is left-handed is crucial to a police investigation dating back 16 years.
When a policeman's house goes up in flames, experts suspect arson. The officer whose home was torched arrests a low-level drug dealer, who confesses. But then the suspect vanishes.
The brutal murder of a state park employee over $2,000 rattles her co-workers and tourists while leaving police to sift through hundreds of leads.
A boy is mysteriously shot in his father's gun club. Ballistics, laser technology, scale models and animation reveal the bullet's amazing path and who was responsible.
One warm summer afternoon, the town of Verona, Wisconsin faced its first triple homicide. To solve the case, investigators had to delve into the world of high rollers and offshore betting.
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.
Two men were murdered in their beds. The next night, arson destroyed a family planning clinic. Investigators find a link between the two separate crimes.
When four-month-old Ryan died under suspicious circumstances, his mother was convicted of his murder.
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.
A woman was found dead on the bedroom floor of her apartment. The crime scene yielded little of value and investigators wondered if they would find enough evidence to make a case.
The murders of an elderly couple leave police stumped until, two years later, they receive a major break.
In 1999, Patrick McRae was found dead in his Des Moines home and the crime scene was awash with blood.
The murder of a millionaire indicated robbery, but investigators wondered if there was something more.
In 1988, the body of a young woman was discovered in an Ohio river. Most of the evidence had been washed away, but the victim's 6-year-old son unwittingly told investigators all they needed to know - without saying a word. The clue was in his genes.
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.
No one in a residential community saw anything the day one of their neighbors was brutally murdered. Fingerprints found at the crime scene helped investigators to apprehend the presumed killer.
When a man's story of a killing contradicted physical evidence, investigators turned to forensic science.
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.
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.
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