In June 2023, Jo Smith, a major crime review officer for Avon and Somerset police, was asked by her sergeant to “take a look at the Louisa Dunne case”. Louisa Dunne was a 75-year-old woman who had been raped and murdered in her Bristol home in June 1967. She was a mother of two, a grandmother, a woman whose first husband had been a leading trade unionist, and whose home had once been a hub of political activity. By 1967, she was living alone, twice widowed but still a well-known figure in her Easton neighbourhood.
There were no witnesses to her murder, and the police investigation unearthed little to go on apart from a palm print on a rear window. Police knocked on 8,000 doors and took 19,000 palm prints, but no match was found. The case stayed unsolved.