The UK wants accountability for the killing of Russian political prisoner Alexei Navalny with frog poison, Foreign Secretary Yvette Cooper has told Channel 4 News. A vocal critic of Russian President Vladimir Putin, Navalny died two years ago, aged 47, while serving a 19 year sentence in a penal colony in the Arctic. The Kremlin claim he died of natural causes but Yvette Cooper announced yesterday European labs confirmed he was killed using toxin found in Ecuadorian dart frogs. #News #Channel4News #Navalny #YvetteCooper #Russia