With the help of advanced DNA analysing technology, police managed to identify a man that attacked, raped, and strangled a woman to death in 1987.
Evidence in the case of the killing of Mary Mathis Davis was stored for 35 years as it couldn't be utilised to shed light on the case.
Meanwhile, the murderer got away with the terrifying crime, lived his life as a free man and died in 2013 at the age of 58.
