Sergei was convicted for a conflict with a school guard in Zamostochye that occurred on the night of November 13-14, 2020. According to investigators, he hung a white-red-white flag on the school grounds, after which a verbal altercation arose between him and the guard, during which threats were made. Sergei was detained for three days, later released on bail and taken into custody in the courtroom.
According to human rights activists, he was released in June 2023, having fully served the sentence imposed by the court.
