Bill Browder was the largest foreign investor in Russia until 2005, when he was denied entry to the country for exposing corruption in Russian state-owned companies. Browder's colleague Sergei Magnitsky uncovered a massive tax scam totalling hundreds of billions of dollars, and the officials he accused of stealing the funds threw him into jail, where he was beaten, tortured, and then died in custody in 2009. Browder decided to act, pushing for accountability of those involved in Magnitsky’s death. Browder’s activism has led to the passing of the Global Magnitsky Act, which authorizes the US government to sanction international government officials believed to be behind human rights violations. Julia Macfarlane sits down with Browder to discuss his work targeting corrupt Russian officials while Sir Richard Dearlove, former head of Britain's Mi6, shares his insight on the complex trails of Russian money, who's hiding it, and who has access to it.