Russian opposition figure Navalny killed by toxin found in poison dart frogs, Europeans say

Russian opposition figure and outspoken Kremlin critic Alexey Navalny, who died two years ago, was killed while in prison by a lethal toxin found in poison dart frogs in South America, five European countries have said in a statement today.

​ Russian opposition figure and outspoken Kremlin critic Alexey Navalny, who died two years ago, was killed while in prison by a lethal toxin found in poison dart frogs in South America, five European countries have said in a statement today. Read More Breaking News, Latest News and Videos | CNN