Navalny, wasn't that the heroic fighter for human rights who said people from the North Caucucus were cockroaches, then mimicked a gun with his fingers saying what he would like to do with them?

An obvious hero of western liberals fighting for human rights and democracy.

How is this cause of death verified? Someone claims they smuggled samples from his body and sent them to two labs in other countries? Sounds like quite a solid and anonymous chain of custody, rock solid proof.