This episode originally aired Mar 14, 2018. The victim had been sexually assaulted and stabbed to death on the beach, just ten yards from the hotel where she was staying. A pair of men's tennis shoes was discovered near her body. Police were sure that if they found the man who fit the shoes, they would also find the man who committed the crime.

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This episode originally aired Mar 13, 2018. A mysterious computer crash pushes a thriving manufacturing company to the brink of collapse, jeopardizing the jobs of hundreds of employees. There is no apparent cause and no obvious clues. Forensic investigators must determine if the crash was the result of a computer defect, human error, or sabotage.

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While Earl Morris was vacationing in California, he learned that his wife had gone missing from their home in Arizona. The search for Ruby Morris involved dozens of investigators, scientists, and even the coast guard. 

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A woman was reported missing, presumed dead. A clue inside the suspect’s watchband and a popular television show helped solve the case.

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A 1986 case of sexual assault and serial murder marked the first time DNA was used as evidence in a court of law.

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Three seemingly unrelated deaths proved to be serial murders. The killer had been careful; he used poison which has no taste or odor. Fortunately for investigators, it also had a unique chemical signature.  

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A twelve-year-old girl claimed she had been abducted and sexually assaulted. She recounted what happened in such a flat, unemotional voice that police found it difficult to believe her. Fibers on her clothing would prove she was telling the truth, and help police to find her attacker.

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Two suspects living in the same apartment were linked to a murder by a gun and a pair of bloodstained boots – items that belonged to the one who claimed he'd never even met the victim. Investigators hoped the manufacturing code stamped on six beer bottles would be distinctive enough to prove who was telling the truth, and who was a cold-blooded killer.

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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.

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Early one morning, a woman went missing on her way to work. A strand of hair in her hairbrush led investigators to unravel the mystery.

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Twenty-four years after the death of a 15-year-old in California, forensic scientists discover enough microscopic evidence to finally bring the killer to justice.

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