Welcome to Investigative Stories from Ukraine, the Kyiv Independent's newsletter that walks you through the most prominent investigations of the past week. If you are fond of in-depth journalism that exposes war crimes, corruption, and abuse of power across state organizations in Ukraine and beyond, subscribe to our investigative newsletter. Kirill Popov, the first deputy head of the Russian Federal Penitentiary Service's Moscow branch, is likely to have overseen the work of the Olenivka camp for prisoners of war, located in the occupied part of Donetsk Oblast, according to the latest investigative documentary by the Kyiv Independent.