Paul Haynes’ search for an elusive serial killer started when he was out of work and had to move back to his childhood home; this soon took over his life and became a full-time occupation. He then teamed up with the crime writer Michelle McNamara who came up with the name 'Golden State Killer.' He told his story to Emily Webb. Get in touch: outlook@bbc.com Presenter: Emily Webb Producer: Emily Webb Picture: Paul Haynes Credit: Sabrina O’Callaghan