The Magnitsky Act - Russian lawyer in Trump Jr. meeting lobbied against it; why does Putin hate it so much?

Sergei Magnitsky was a thirty-seven year old Russian lawyer and auditor who worked for Hermitage Capital Management, a firm founded in 1996 by Bill Browder, the grandson of the famous leader of the American Communist Party, Earl Browder (1891-1973). Hermitage made tens of millions of dollars in the rush to buy up and sell state assets in the chaotic economic circumstances of Boris Yeltsin’s Russia. Browder’s efforts in the early 2000s to use the emerging Russian legal system to protect his investments and encourage large companies to operate transparently led him to cross swords with the financial and business elite of Putin’s Russia.