Since the beginning of the full-scale invasion, Russia has used the Olenivka prison, located in Russian-occupied Donetsk Oblast, as a camp for prisoners of war and civilian hostages from Mariupol. Thousands of Ukrainians, including servicemen from the Azov Brigade, have been held captive in its cells. Those who returned from captivity spoke about the inhumane conditions of detention, hunger, and torture in this prison. For six months, the Kyiv Independent team has been working on recreating a picture of the events that took place in Olenivka. Journalists recorded dozens of interviews with the servicemen and civilians who witnessed gross violations of international law.