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. Avia FED Service, a Russian daughter company of a Kharkiv FED machine-building plant, supplied Ukraine-made spare parts to the Russian aviation industry after the start of the Russian war against Ukraine and despite sanctions, according to a joint investigation by Organized Crime and Corruption Reporting Project (OCCRP) and Russian independent media IStories.