I think we need more details. Navalny was a western style demonstration-organizer. I don’t blame the Russian authorities for cracking down on demonstrations and their organizers. Had the US done so in the 1960’s perhaps the US would not be going down the tubes like it is now.
If Navalny died as a result of a “hunger strike” then it was on him. If he died as a result of murder by another prisoner, consider that many US prisoners are murdered in prison. Jeffrey Dahmer was one. If he was murdered by the authorities, then that is too much.
Attempt on Chauvin comes to mind. Where does that scenario fit?
It's fairly evident about what's actually happened here. Coming off Carlson's interview, Putin finally decided that it was time to get rid of Navalny once and for all, after hustling him up to an Arctic gulag in the middle of the night a few weeks ago. That suggests that Navalny's death has been planned for a while now.