Forensic Files

The investigation into the disappearance of Helle Crafts leads to the arrest, and conviction for murder, of her husband.

Fifteen-year-old Trey Cooley is shot and killed in the lobby of his father's Dallas gun club. Investigators rely upon a combination of old-fashioned police work and computer animation in order to solve the shooting.

Investigators use DNA typing on blood evidence in order to convict a man of his wife's murder.

Arizona police rely upon the expertise of a molecular geneticist in solving a murder. DNA profiles link unidentified seed pods, found in a suspect's truck, to a tree growing in the same place where the body was found.

After police believe themselves to have captured a serial rapist and murderer, DNA testing suggests that they have the wrong suspect and leads to another arrest.

Since 1976, when 180 war veterans were hospitalised in Philadelphia with pneumonia-like symptoms, the disease has been resurfacing every few years, leaving doctors baffled.