At a murder scene, investigators find a shoe print, several foreign hairs, and unknown fingerprints. But they believe the most telling piece of evidence is the bite mark on the victim's chest.
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A Modesto, California, teenager went missing. There was no sign of a struggle in her home, and police suspected she'd simply run away until her naked, bruised body was discovered in a ditch 20 miles away.
The development of technology could help solve a murder case that is twelve years old.
Detectives discover new clues left by a stalker's letter to his victim.
The 1996 Seattle murder of suburban couple Raquel Rivera and Jay Johnson is detailed. Evidence from the couple's dog, Chief, eventually ties one of the murderers to the scene. This is one of the first cases where dog DNA was used to convict.
Respected surgeon is stabbed to death. However, the key suspect has a solid alibi.
An Alaskan police officer found a woman's body while on routine patrol of a public park.
Blood spatter analysis and an investigation lead police to the truth when a woman is found dead.
A dismembered body is dumped on the side of the New Jersey Turnpike.
Photographs found in a dumpster lead to the killer of a model.
A killer tried to incinerate and destroy everything that could link him to his crime. But in doing so, he inadvertently created new forensic evidence which came to light with a technique never before used in a criminal investigation.
After a carjacking, police have a small window of opportunity to locate a mother and her child.
A woman, who had recently rejected a co-worker half her age, ends up dead in her driveway.
Children die at an alarming rate at a Texas hospital, and one nurse may be involved.
Investigators sift through the ashes of a fire that killed a 40-year-old woman. The fire appeared to have been started by an unattended cigarette. On a closer look, forensic scientists discover the cause was far more complicated.
California police had several suspects in the robbery and brutal murder of an elderly couple. Ten years later, a determined forensic scientist used material from a dentist's office to uncover ballistic evidence that had been overlooked.
When police recovered the submerged car of a man reported missing, they expected to find his body. But it wasn't there. The investigation that followed would uncover an obsession turned deadly and the motive for murder.
A strand of hair and traces of blood lead investigators to a woman's killer.
Scientists and detectives use DNA to solve a string of rapes and murders.
The body of a young woman was found under an isolated ramp of the Interstate, and a tiny, unique fiber on the victim's clothing led San Diego police straight to the most unlikely of killers.
When a young girl is found dead, her parents tell the police that dogs attacked and killed her.
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