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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The body of 16-year-old Leanne Tiernan was discovered nine months after she disappeared. Forensic scientists found clues that painted a virtual portrait of her killer.
A woman was shot to death in her Connecticut driveway. Now police must determine if love had turned deadly.
On a cold December night in 1993, Rose Larner stopped in a convenience store on her way to her boyfriend's house. She was never seen or heard from again. A tiny clue found years later revealed a tragic tale of drugs, romance and revenge.
A married couple decided to escape the cold of winter with a mini-vacation in Key West. The wife went missing, and police searched every square inch of the island, they found nothing but a pair of sandals which might have belonged to her.
Heavy rains and snow run-off carried manure into Milwaukee's water supply in 1993, leading to an epidemic of gastrointestinal illness affecting 400,000 people.
A husband confesses to his wife's murder, only to be found not guilty a year later when a phone tip and forensic evidence point to another.
In rural Canada, Dr. John Schneeberger is accused of sedating and sexually assaulting one of his female patients and his stepdaughter. DNA tests demonstrate that the doctor is innocent, but the patient insists that he sedated and raped her.
In little more than a month, two women who lived in the same apartment complex were brutally murdered.
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.
A three-year-old develops a respiratory condition. His father has Alzheimers. An investigator reveals that their ill health is due to mold in their modern home.
It was one of the most unusual cases in forensic history. Investigators had to find a way to solve a murder case with evidence which consisted of a squashed tomato found at the crime scene.
In the 1990s, the media dubbed Richard Rogers the "Last Call Killer" because he targeted men in gay bars.
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.
In 1993, young mother Tammy Tatum was sexually assaulted and murdered in her Longmont, Colorado apartment.
In 2007, the Florida mobile home of Effie and Michael Ratley catches fire. Michael heroically rescues his wife and infant son. A month later, his wife is found beaten to death in a bedroom of his parents' home.
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.
In 1986, Gary Dale Larson was stabbed to death in his Edmond, Oklahoma home and then the killer sexually assaulted Larson's girlfriend Janet Haynes.
A security guard disappeared from his post without a trace his remains were found a year later in a remote camp site.
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.
When two women went missing and were later found brutally murdered, police wondered if they were victims of a hate crime.
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