
Forensic Files
A nurse learns that she has been deliberately infected with HIV.

A nurse learns that she has been deliberately infected with HIV.

A nurse learns that she has been deliberately infected with HIV.

A nurse learns that she has been deliberately infected with HIV.

Authorities track a kidnapper who allowed his victim, 17-year-old Shari Smith, to write a last will on a notepad and then informed the family of her murder, as well as the later murder of a 10-year-old, Debra May Helmick.

Authorities track a kidnapper who allowed his victim, 17-year-old Shari Smith, to write a last will on a notepad and then informed the family of her murder, as well as the later murder of a 10-year-old, Debra May Helmick.

Authorities track a kidnapper who allowed his victim, 17-year-old Shari Smith, to write a last will on a notepad and then informed the family of her murder, as well as the later murder of a 10-year-old, Debra May Helmick.

Technology able to analyze human bite-marks yields information on a woman's death.

Technology able to analyze human bite-marks yields information on a woman's death.

Technology able to analyze human bite-marks yields information on a woman's death.

A bite mark is all the evidence needed to convict a suspect who was robbing tourists in Florida.

A bite mark is all the evidence needed to convict a suspect who was robbing tourists in Florida.

A bite mark is all the evidence needed to convict a suspect who was robbing tourists in Florida.

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.

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.

Detectives use a forged signature to find a woman's abductor.

Detectives use a forged signature to find a woman's abductor.

Forensic scientists work with the only clue recovered from a multiple-victim shooting: a 12-gauge shotgun. Scientists use unique methods to lift the serial number from the weapon to trace it to its owner.

Forensic scientists work with the only clue recovered from a multiple-victim shooting: a 12-gauge shotgun. Scientists use unique methods to lift the serial number from the weapon to trace it to its owner.

In 1981, an 86-year-old California woman was murdered, and her house was ransacked. The crime would remain unsolved for sixteen years, until DNA profiling and new fingerprint technology helped identify the killer.

In 1981, an 86-year-old California woman was murdered, and her house was ransacked. The crime would remain unsolved for sixteen years, until DNA profiling and new fingerprint technology helped identify the killer.