Last summer, Russian opposition leader Alexey Navalny narrowly survived an assassination attempt, widely believed to have been organized by Russia’s security services, through a Novichok nerve-agent poisoning. Now, without concerted action, he may die from medical neglect in a Russian penal colony where the authorities locked him up following a mockery of a trial. The botched nerve-agent attack, since exposed, was supposed to have been accomplished with deniability. If Navlany now dies in prison, the blame will lie unequivocally with the Kremlin.