Story highlights Putin critic Boris Nemtsov was killed 2 years agoPutin has condemned the killing(CNN) Russians took to the streets Sunday to mark the second anniversary of the murder of Kremlin critic Boris Nemtsov, who was shot dead in central Moscow while walking with a female friend. A gunman in a car opened fire on Nemtsov on February 28, 2015, prompting immediate speculation that the killing was targeted. Hours before his killing, he had done a radio interview urging people to turn out for the rally. JUST WATCHED Five arrested in Kremlin critic's killing Replay More Videos ... MUST WATCH Five arrested in Kremlin critic's killing 01:49Putin quickly condemned the killing and expressed his condolences to his family. Nemtsov was a top official with the Republican Party of Russia/Party of People's Freedom, a liberal opposition group.

Source: CNN February 26, 2017 11:54 UTC