Dmitry Bogatov was arrested on the 6th of April: he became part of the big penal case initiated by Russia’s Investigation Committee on "incitations to mass riots" during the protest action that took place on the 2nd of April in Moscow. According to the Investigation Committee, Bogatov was publishing messages on the forum sysadmin.ru, inciting to violent actions, for example, "he" was suggesting to bring to the Red Square "bottles, fabric, gasoline, turpentine, foam plastic". According to the Investigation, the experts had analyzed the text of these messages and proved a "linguistic and psychological characteristics of incitations to terrorism". However, Dmitry claims that he has nothing to do with posting the incendiary messages. Dmitry Bogatov, 25 years old, teaches maths in MFUA (Moscow Finance and Law University) was a free and open source software activist (https://sinsekvu.github.io/pages/about.html). Dmitry was administrating a Tor exit node (https://atlas.torproject.org/#details/2402CD5A0D848D1DCA61EB708CC1FBD4364AB8...) from his house. In fact, the author of "incendiary messages" (called "Airat Bashirov") was using Tor, and, by lack of chance, he used the ip adress of Dmitry's exit node. Dmitry's lawyer, Alexei Teptsov, presented videos from surveillance cameras, that proved that, during the moments when the "incendiary messages" were posted, Dmitry was away from his computer. He was coming back from a fitness center with his wife, Tatiana, a genetician, and then went to a supermarket, where cameras were also working. Moreover, "Airat Bashirov", the author of the provocative messages, continues to post on sysadmin.ru, while Dmitry is under arrest. The last post was seen on the forum on April 11. Dmitry will stay in pre-trial detention center until June 8 at least. Now the Investigation is examining all his seized devices. Dmitry Bogatov aka KAction, Russian free software activist and mathematics teacher at Moscow’s Finance and Law University, arrested in Russia and charged with extremism. https://news.ycombinator.com/item?id=14096625 https://meduza.io/en/feature/2017/04/10/mathematics-teacher-accused-of-incit... https://geektimes.ru/post/287944/ (russian)