A serial killer was on the loose and police had to find him before he struck again. Their most promising lead was an unusual one: a bloody fingerprint on the body of one of the victims.
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When a 62-year-old man opens a car restoration business and becomes seriously ill, his doctors cannot find the cause, but forensics can identification of a highly toxic metal in the victim's blood leads to his poisoner.
When the decomposed body of a teenage girl is discovered, police have no clues to her identity. To solve the case, investigators turn to bug larvae found on the body.
When a dedicated, well-respected teacher disappeared, police had to determine if she'd gone on vacation without telling anyone, or if she was the victim of foul play.
Avis Banks and her unborn child were brutally murdered. The body was discovered by her fiancé, Keyon Pittman. When police learned that Pittman was having affairs with other women, he became the prime suspect.
The disappearance of Philadelphia college athlete Aimee Willard is investigated after her car is found on the roadside. When her body is found, the police find unusual marks and DNA evidence that eventually lead to her killer.
A college senior was found raped and murdered near an unpaved footpath used by students to walk from one side of campus to the other.
A woman convicted of killing her mother in a car fire is granted a new trial. An expert witness has a different opinion as to how the fire started and, if proven, would clear the woman of any culpability.
The investigation into the kidnapping and rape of an 18-year-old Ohio woman is aided when the victim returns hours after the incident occurred. With her help, the police are able to track the assailant to his front door.
When a Pennsylvania man checks into a hospital for leg pain and later dies of thallium poisoning, police investigate his wife and find her in the process of collecting an insurance payment for her previous husband's death.
When police discovered the body of Douglas Beamish's estranged wife, authorities linked 20 cat hairs found on her jacket to a cat owned by Beamish's parents. It was the first time animal DNA was used to solve a criminal case.
Paul Gruber's daughter suspected something was wrong when she received birthday cards addressed from her father, but written in a stranger's handwriting.
The wife of an Air Force officer was found dead in her bed with a plastic laundry bag near her face. Further investigation proved that the scene had been staged. Her death wasn't an accident, it was cold-blooded murder.
A body is found stuffed into a suitcase forcing the police to search though the landfill for another missing victim.
Responding to a 2008 garage fire, Illinois emergency response discovered a man crushed beneath a truck.
When a car was found in a drainage ditch with two bodies inside, a fingertip torn from a latex glove would point investigators to both the crime scene and the killer.
The investigation into the kidnapping and rape of an 18-year-old Ohio woman is aided when the victim returns hours after the incident occurred. With her help, the police are able to track the assailant to his front door.
The body of a young girl was discovered on isolated farmland near Delano, California. She had no ID, but police found mailbox keys in the pocket of her jeans.
Dianna Green was brutally attacked in her own home and her unborn child was killed. After coming out of a coma and regaining her memory, she is able to identify her husband as the perpetrator.
Stephen Scher and Martin Dillon went skeet shooting on a beautiful spring day and Martin was shot dead.
When 19-year-old Lori Auker left her Pennsylvania home for work and never arrived, it took space-age technology, cat hairs and insects to pinpoint the image of the woman's abductor.
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