Forensic Files

When 23-year-old Tina Biggar goes missing, her boyfriend and family fear she has been murdered. A police investigation reveals details about her past that no one suspected: She was a student by day and a $100-an-hour call-girl by night.

When convenience store employee Wanda Mason is found dead, investigators find that the entire murder has been caught on the store's security camera. But the image of the killer is so degraded that it seems impossible to positively identify him.

6-year-old Nicole Rae Walker was killed in a hit-and-run in her Ft Lauderdale neighborhood. The prosecutor combines the talents of an accident reconstruction expert with a video specialist to create a graphic demonstration of the moment of impact.

When heart surgeon Darryl Sutorius is found dead in the basement of his upscale Cincinnati home, police assume he committed suicide. Further investigation reveals that his new wife, Della, has a history of violence and an insatiable desire for money.

Investigators look into the shooting death of Russ Stager, a popular gym teacher, and discover that his death was not an accident; a message the victim recorded before his death reveals a story of greed.

When a young woman goes missing, the police investigation reveals that she led a double life - student by day, call-girl by night - but when her body is discovered, even more strange truths are uncovered.

Romanian archbishop Valerian D. Trifa, living in the U.S., is accused of being a Nazi war criminal, and forensic experts find evidence on an incriminating, 40-year-old postcard.

When a doctor's wife disappears, investigators use concrete from the doctor's yard and the recollections of a child to determine what happened.

When the decomposed body of a young girl is discovered, police have no clues to her identity, but days earlier, a stabbing victim told them she thought she might have witnessed a murder.

With children dying at an alarming rate at a Texas hospital, authorities narrow down their probe to one nurse, but the murder weapon remains elusive.

Police charge Alan "The Zenith Man" Ridley with murdering his wife, Virginia, but following an autopsy, medical detectives believe he may not have killed his wife after all.

A young girl is found dead, the victim of an apparent sex killer; there are few clues to the killer's identity, but authorities are intrigued by unusual orange fibers embedded in clothing found near the victim.

A mother and her two young daughters are found brutally murdered and sexually violated; the crime scene has no shortage of evidence, but investigators cannot find a conclusive link to their prime suspect.

A woman identifies her husband as her attacker, but questions arise 16 years later regarding her recollections.

When a policeman's home burns to the ground, he later arrests a man who confesses to arson, but the confession seems dubious.

A decomposed body is found in a barrel, and a dilapidated address book may hold the answer, but investigators must find a way to read the pages because the passage of 30 years has turned them blank.

Insects and a single strand of hair uncover an additional suspect in the killing of a young mother and her baby in Lehigh Valley, Pa.

New evidence including fibers and weather patterns point to a different killer in the 1986 case of a Pennsylvania dentist's murdered wife.

A cunning serial rapist who leaves no decisive evidence forces investigators to rely on geographical profiling in their search for an identity; DNA from a cigarette butt may provide the final piece of evidence needed to catch the suspect.