Justin Brooks is the director and co-founder of the California Innocence Project, a non-profit organisation based in San Diego, which provides pro bono legal services to individuals maintaining their innocence. In its 20 year history, they have successfully freed 30 innocent individuals, including Brian Banks, whose story has been made into a Hollywood film. Brooks, played by Greg Kinnear, joined me for a conversation about his and CIP's work, and where it all began.