An examination of the first time animal DNA was used to solve a criminal case. When the body of Douglas Beamish's estranged wife, Shirley Duguay, was discovered, authorities linked 20 cat hairs found on her jacket to a cat owned by Beamish's parents.
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The news of a flight attendant's brutal murder prompted the son of a victim who had been killed five years earlier to contact police. Both murders had similar MOs, and analysis of biological evidence proved that these were serial killings.
A mother attempts to clear her name after authorities charge her with murdering her son in a fire.
A pharmaceutical tycoon's wife is found dead in her SUV in a half-frozen creek.
Teenager is found half-naked with her throat slit. A single hair on her thumb may finger the killer.
An examination of the 2002 DC area shooting spree that resulted in ten murders.
When firefighters found an entire family dead inside their home, it looked like a murder-suicide, but there were several inconsistent clues in the rubble. Could ballistics, a time card, and some secret audiotapes unravel the mystery?
Police are puzzled about a murder until a frozen river five miles away provides a breakthrough.
A man died in his home after a long history of heart disease. It was assumed that this was the cause of his death. A few weeks after the funeral, rumors surfaced that the death was no accident.
A man is found dead in his home, and his ex-wife has a perfect alibi. To determine the time of death, investigators need to know when the victim ate his last meal. An endocrinologist, a forensic botanist, and a short-order cook answer their question.
The investigation into a brutal attack on two boys near a pond relied on evidence fished out of the murky water. It was the first case where diatom evidence was used to place a suspect at the scene of the crime.
The police investigate when a severed leg is discovered in the garbage. Conventional means of identifying the victim are impossible, leading investigators to rely on DNA, forensic anthropology, and toxicology to identify the victim.
Evidence suggests the suspect of an unusual robbery-homicide case ran out of the house and not in.
Early one morning in a deserted area outside of Phoenix, a motorcyclist discovered the body of a young woman. She had been beaten, bound, strangled, and possibly raped.
A man tells police he shot an intruder who had attacked and murdered his wife. The husband paints a tragic picture and is dubbed a hero. Four years later, forensic evidence leads police to reexamine the motives of this so-called hero.
A woman is abducted and a month later found dead; a tip leads investigators in the right direction.
An Alaskan police officer found a woman's body while on routine patrol of a public park.
In 1992, 22-year-old Dawn Bruce was brutally murdered in her Virginia apartment.
A murder investigation is helped by a legal requirement that bars have video cameras installed on the premises. Video, hair, and blood lead to the murderer.
Detectives discover new clues left by a stalker's letter to his victim.
Doctors cannot pinpoint the source of a businessman's illness.
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