After 6-year-old Michelle Lee Dorr went missing, her father confessed to murdering her. But investigators soon poked holes in his story, leaving the case unsolved for 14 years.
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In 1999, a 12-year-old was found murdered in her home in Minnesota. Despite a meticulous search of the home and an exhaustive investigation, police had no suspects.
In 2007, Shamaia Smith disappeared from the strip club she worked at in East Hartford, CT. Police look at various customers of the strip club, but focus on local businessman Kenneth Otto.
When a hit-and-run accident claimed the life of a high school athlete, everyone in town mourned his passing. Finding the killer was a long shot at best.
In 1998, an evening out at a Maryland murder mystery theatre performance turns into a real-life whodunit when the badly burned body of Stephen Hricko is discovered in his hotel room after a fire.
A serial arsonist was on the loose in Washington, DC. Each of the fires was started with the same type of incendiary device. The perpetrator was very careful, and seemed to leave no evidence behind... but there were clues in the ashes, and it was up to forensic scientists to find them.
In 1987, the death of Crystal Purcell was considered an accident. Then in 2001, Barbara Purcell called police to suggest that her estranged husband had killed Crystal.
A fireman died from what appeared to be heart disease, but his family was skeptical of the cause of death.
A suspect's former lover comes forward with a tale of murder, mutilation and cremation, but there's no way to test the story's validity until a plant pathologist and a dendrochronologist conduct tests where the cremation supposedly occurred.
On the way to Yosemite National Park, a car carrying three Secret Service agents collided with another car.
A woman who suffered from mental illness is found dead. Was it due to natural causes, suicide or murder?
In 1981, six-year-old Cassie Hansen disappeared from her St. Paul, Minnesota church during an evening service.
After 6-year-old Michelle Lee Dorr went missing, her father confessed to murdering her. But investigators soon poked holes in his story, leaving the case unsolved for 14 years.
When the head chef of a historic Philadelphia restaurant was found dead, investigators interviewed the usual suspects: family, friends and coworkers. As they sifted through the evidence, police uncovered a chilling tale of debt and deceit.
The wife of a respected police officer was murdered in her own home. The crime went unsolved for more than a decade, until a newly formed cold case unit took a fresh look at the evidence.
After a Philadelphia convention, 180 legionnaires contract pneumonia-like symptoms and 29 of them die.
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.
How did the stalker obtain the security system code for his victim's home? How did he steal her personal photographs? Police needed answers and they found them in the most unlikely of places.
A 29-year-old woman was killed instantly when a bomb exploded in her home. The device was so powerful that shrapnel was embedded in houses across the street. The bomber had not only knowledge and skill, but also a motive for murder.
Janice Johnson was found dead at the foot of her stairs. Police in Nova Scotia had to answer the question: Was it an accident or murder?
In 1987, the death of Crystal Purcell was considered an accident. Then in 2001, Barbara Purcell called police to suggest that her estranged husband had killed Crystal.
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