A young, attractive hairdresser was sexually assaulted and murdered in her own beauty salon. The evidence at the crime scene didn't match any of the suspects and the case went cold for ten years.
When a college co-ed vanished without a trace, her fellow students were concerned about her safety and their own.
A woman was shot to death in her Connecticut driveway. Now police must determine if love had turned deadly.
Digital enhancement of security camera video shows that what appears to be a casual encounter is actually a forced abduction, leading to murder.
After inspecting storm damage to a home in Tampa, an insurance assessor simply disappeared. Thirty hours later, her body was found in a nearby river. But the killer had been careless.
In 2003, St. Cloud teenager Jason MacLennan returned home after a night out with friends and discovered his father Ken's body lying in a pool of blood.
When court clerk Peter Porco doesn't report to his work in November 2004, a courts officer is ordered to the Porcos' family home in Bethlehem, NY.
In 2000, Judy Southern arrived home from work and was shot by a gunman waiting within. Her husband Allen arrived shortly afterwards, called 911 to report his wife had been shot.
A body is found stuffed into a suitcase forcing the police to search though the landfill for another missing victim.
Lives changed in the 20 years following an unsolved murder, and so did forensic science. In time, a high-powered microscope and DNA profiling revealed a clue no one had seen before.
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.
Police are able to create a composite sketch of a man burnt beyond recognition. But tracking the killer is more challenging.
In 1996, Derrick Duehren returned to find his Oregon home burned to the ground. His wife's charred remains were later found in the rubble.
A woman appears to have lost control of her SUV and plunged down an embankment into a shallow creek. But investigators suspect foul play when they find snowy footprints leading from the crime scene.
A woman was found dead on the bedroom floor of her apartment. The crime scene yielded little of value and investigators wondered if they would find enough evidence to make a case.
A serial rapist is on the loose in a Texas town. No one knew where he'd strike next, but the audacity of his attacks and the escalation of violence against his victims made finding him imperative.
A killer made great effort to obscure the shoe impressions left when he tracked blood on the floor, but he ended up creating new incriminating evidence...
Doctors don't know why a scientist is gravely ill. When tests reveal the cause, it's too late to save him.
A skeleton was discovered in the North Carolina marshlands. Investigators learned she'd been dead for months.
When a man's story of a killing contradicted physical evidence, investigators turned to forensic science.