In October 1945 he was dismissed from the post and charged with setting fire to one of the barracks in the camp and ordering gunfire on the inmates trying to put out the flames, an incident in which 48 prisoners died.
Near the end of the war he joined the Milicja Obywatelska and the infamous Ministry of Public Security, where he was quickly promoted to the rank of sergeant.
In 1956, during the Khrushchev Thaw following the end of Stalinism in Poland, the investigation was resumed and Gęborski was arrested, but the court declared him not guilty.
In the 1960s he demanded compensation for the 22 months spent in prison prior to his trial, but the court declared that the arrest had been necessary.
Finally, after the end of communist rule in Poland, in the late 1990s, the trial for the 1945 incident in Łambinowice was resumed by the local court in Opole.