More than three years after he died in prison, whistle-blowing Russian lawyer Sergei Magnitsky was found guilty of tax evasion by a Moscow court Wednesday. The posthumous trial of Magnitsky was a macabre chapter in a case that ignited a high-emotion dispute between Russia and Washington that has included U.S. sanctions against Russians deemed to be human rights violators, a ban on the adoption of Russian children by U.S. citizens and calls for the closure of Russian non-governmental organizations receiving American funding. Magnitsky was a lawyer for U.S.-born British investor William Browder when he alleged in 2008 that organized criminals...