The world’s oldest cold case?

Fifty eight years may be the biggest gap between crime and punishment in world history.

In June 2025, a 92-year-old man was convicted of the murder of Bristol pensioner Louisa Dunne in her home in 1967. What clues did he leave behind? How did police manage to track this killer after more than half a century?

Award-winning film-maker Robert Murphy was granted rare access to Avon and Somerset Police’s Major Crime Review Team to hear how, starting with a box of unread papers, they pieced together a case which had always been deemed unsolved.