In mid-December 1922, as Gabriel Narutowicz was assassinated, Koc took part in the Piłsudski's officers meeting in the II Department's headquarters. The meeting aimed at calming the created situation by Piłsudski's military intervention (albeit Piłsudski had no formal power to do so) and, eventually, at taking over power in Poland. The officers present (including Koc, Bogusław Miedziński, Ignacy Matuszewski, Ignacy Borner, Konrad Libicki, Kazimierz Stamirowski and Henryk Floyar-Rajchman) contacted the headquarters of the Polish Socialist Party (PPS) in order to organise a general strike, a plan that did not come to life because Ignacy Daszyński refused to cooperate.