but what would the motive be in the case of the critic vladimir karamerza?ridge educated, he was for years a washington-based reporter for a russian tv station. so he was well connected and had perfect english, which he used to incessantly criticize the regime on the international stage. >> a government that is based on genuine support does not need to jail its opponents. >> reporter: as if 'tis outspokenness wasn't enough to anger the kremlin, he made matters worse for himself when he joined forces with this man. >> it's death if you cross the putin regime. >> reporter: bill browder was for years the largest foreign investor in russia, and putin's champion. but he turned into a dogged adversary when his russian tax attorney sergei magnitsky blew the whistle on alleged large-scale theft by government officials. >> we discovered massive corruption of the putin regime. sergey exposed it, testified against officials involved. he was subsequently arrested, put in pretrial detention, tortured for 358 days, and killed at the age of 37. >> reporter: browder was so