A social care consultant who advises the government on children in care, is raided by police in 1992. A detective finds evidence linking him to the Paedophile Information Exchange (PIE).

A local social worker is called in. He and the detective search through seven boxes of documents, brought from the home of the suspect. They discover that not only was he a member of PIE, but a central figure and high up in establishment circles.

Alex Renton sits down with the social worker, and hears about his decades long quest: to expose members of the Paedophile Information Exchange within social care and stop them from harming children.

In their public literature, the leaders of PIE members had always claimed their relationships with children were consensual. Alex Renton tracks down one of the boys, now a man in his fifties, who was abused by the childcare expert and his partner.

Archive: Inside Story- The Secret Life of a Paeophile, 1994, BBC. News report on the White Inquiry into Islington Children's Homes child abuse scandal, 1995, BBC; The Scandal of Crookham Court, That's Life!, 1991, BBC.

Presenter: Alex Renton Producer: Caitlin Smith Executive Producers: Gail Champion and Gillian Wheelan Story Consultants: Jack Kibble-White and Kirsty Williams Sound design: Jon Nicholls Theme Tune: Jeremy Warmsley

Details of organisations offering information and support for victims of child sexual abuse are available at bbc.co.uk/actionline