When the wife of a well-known dentist is found dead, police struggle to identify a suspect. Some fibers and a study of the weather patterns on the night of the murder break the case open.
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A woman's death in Pennsylvania triggers a homicide investigation into another woman's death in North Carolina.
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.
In 1993, the state of Florida was known for more than just Disney World. Worldwide attention focused on a rash of robberies which targeted tourists.
A woman is shot to death in her store just one day before she is to testify against the man accused of robbing her. The robber becomes the prime suspect, but he has a solid alibi.
A mother of two vanishes after a shopping trip. Her body is discovered a month later. Witnesses say they saw the victim being forced into a car by an unknown person.
In 1962, the people of the small town of Hanford, California lost their sense of peace when one of their own, 15-year-old Marlene Miller, was murdered.
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.
A man died in his home after a history of heart disease. Rumors surfaced that the death was no accident.
Authorities track a kidnapper who let his victim write a last will and informed the family of her murder.
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.
In 2002, the eyes of the world were on Virginia and Maryland. A serial sniper was on the loose, killing innocent, unsuspecting citizens. Just how was he caught?
A murder investigation in Florida crosses jurisdictions from New York and Jamaica. The police rely on cell phone mapping, wiretapping and a host of forensic evidence to link a suspect to a murder.
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.
In the case of the Center City Rapist and the murder of Shannon Schieber, Philadelphia authorities use an anonymous letter and geographic profiling to hone in on a suspect.
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.
The 1987 disappearance of Houston resident Tracy Jo Shine is recalled. The investigation went cold until 2000 when a "cold case squad" learned that the woman's ex-boyfriend Michael Neal had bragged about killing her.
A woman disappeared along a California highway in 1991. Three years later, the case was solved when a man's refrigerated truck was looked upon with suspicion.
While investigating an apparent overdose suicide, detectives recover incriminating files from a computer.
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.
In the 1980s, a trio of unsolved murders occurred in Wichita Falls, Texas. Later, a fourth murder from the same time period provided the police with far more than they realized.
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