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In this photo taken on Monday, Feb. 27, 2017, Denis Voronenkov visits a movie theater in Kiev, Ukraine. Ukrainian police said Voronenkov was shot dead Thursday by an unidentified gunman at the entrance of an upscale hotel in the Ukrainian capital. Voronenkov, 45, a former member of the communist faction in the lower house of Russian parliament, had moved to Ukraine last fall and had been granted Ukrainian citizenship. (AP Photo/Oleksandr Synytsia)
In this photo taken on Monday, Feb. 27, 2017, Denis Voronenkov visits a movie theater in Kiev, Ukraine. Ukrainian police said Voronenkov was shot dead Thursday by an unidentified gunman at the entrance of an upscale hotel in the Ukrainian capital. Voronenkov, 45, a former member of the communist faction in the lower house of Russian parliament, had moved to Ukraine last fall and had been granted Ukrainian citizenship. (AP Photo/Oleksandr Synytsia)

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Putin critic gunned down in Ukraine

Denis Voronenkov, a former Russian lawmaker and Kremlin critic who fled to Ukraine last year, was shot dead in Kiev. CNN's Brian Todd has the latest.

Putin critic gunned down in Ukraine

Denis Voronenkov, a former Russian lawmaker and Kremlin critic who fled to Ukraine last year, was shot dead in Kiev. CNN's Brian Todd has the latest.