The head of Ukraine's Defence Intelligence says Russian opposition leader Alexei Navalny died from a blood clot, denying speculation that he was killed while in prison.
I mean, you can always posit another hypothesis because it is very difficult to prove a negative, but if a coagulant or something was administered to him, it should turn up on an autopsy. Ultimately, given the position of Ukrainian intelligence here, the more reasonable conclusion is that people die eventually and that's the extent of the meaning of what happened (or perhaps you could add that the stress of his situation hastened his demise, which is probably true).
I mean, you can always posit another hypothesis because it is very difficult to prove a negative, but if a coagulant or something was administered to him, it should turn up on an autopsy. Ultimately, given the position of Ukrainian intelligence here, the more reasonable conclusion is that people die eventually and that's the extent of the meaning of what happened (or perhaps you could add that the stress of his situation hastened his demise, which is probably true).