This DER SPIEGEL article seems to be motivated by the recently legislated U.S. sanctions against Nord Stream 2. Germany stands to gain the most from this pipeline, which is why the timing seems so suspicious.
Browder responds to DER SPIEGEL’s allegations in the video below.
To learn more about the story behind the Magnitsky Act, watch this video series from 2010.
Image By ActuaLitté – William F. Browder, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=41225971