The field of scientific art conservation is not a crowded one; James Martin, who set up the first for-profit art lab in the US, has been consulted in nearly every major fraud case in the past 25 years, often working alongside the FBI or other investigators. When he is described as the premier forensic detective working in art today, the accolade comes not only from people such as John Cahill, a New York lawyer who has managed dozens of art transactions, and who called Martin “hands-down the best in the business,” but also from those on the other side of the fence, so to speak.