Between 9 and 11 July 1946, twelve civilians (one of them apparently mentally challenged) were arrested by MBP officers as perpetrators of the pogrom. The accused were tried by the Supreme Military Court in a joint show trial. Nine were sentenced to death and executed the following day by firing squad on the orders of Polish Communist leader Bolesław Bierut. The remaining three received prison terms ranging from seven years to life. According to author Krzysztof Kąkolewski ("Umarły cmentarz"), the twelve had been picked up from the watching crowd by the secret police.