Stephen Sackur speaks to Bill Browder of Hermitage Capital Management. In November 2009, a young Moscow lawyer died in police custody. It was the latest twist in a dark tale of alleged fraud, corruption and intimidation which has pitted Bill Browder against the Russian government. He used to run a multi billion dollar investment business in Moscow; now he calls Russia a criminal state, which he is determined to confront. Has he picked a fight he can never win?