The only overlap between the Magnitsky case and what's going on right now is that the Magnitsky case was an emblematic example of how Russia defies laws and goes about covering up crimes and publicly lying. Sergei Magnitsky was a Russian citizen exposing a crime against his own country and was murdered by his own government. That was then covered up by his own government, going right up to Vladimir Putin.
The mindset of what happened to Sergei Magnitsky is the same mindset that allows Russia to invade Ukraine and to do various other things, but there's no overlap in terms of the facts of the case.