Bill Browder was in his central Madrid hotel room Wednesday morning when a knock came on the door. It was just after 9 a.m.; a couple of hours later, Browder was scheduled to meet with Jose Grinda, the Spanish prosecutor who specializes in deep investigations of Russian organized crime and corruption. But outside Browder's room stood a hotel manager and two police officers. "Mr. Browder,This article originally appeared on www.rollingstone.com: Bill Browder: Inside the Arrest of 'Putin's Number One Enemy'