John Sweeney has been in Kyiv since before Russia's invasion of Ukraine - reporting the war from on the ground. But he's been on Vladimir Putin's case for over twenty years. This episode, he examines the evidence for the poisoning and murder of Kremlin critics going back decades, and recalls his own face-to-face encounter with President Putin. Taking On Putin is funded by you - the listener. You can support the podcast on Crowdfunder.   Follow John on Twitter - @johnsweeneyroar