Code of a Killer

SYNOPSIS

Part one of two. Drama telling the true story of how a brilliant scientist and pioneering detective joined forces to create the most significant advance in modern criminal investigation. In 1984, Dr Alec Jeffreys (John Simm) unlocks a remarkable technique to read every person's unique DNA fingerprint, while a few miles away, DCS David Baker (David Threlfall) leads the search for the murderer of a local schoolgirl. Two years later, a second youngster is killed and a teenager confesses - but denies the first crime. Certain that the same man was responsible for both incidents, Baker approaches Jeffreys to help prove his theory. Co-starring Robert Glenister, Anna Madeley, Andrew Tiernan and Lorcan Cranitch.