[1] In April 1945, after the liberation of Brno by the Red Army, Pokorný took over command of the newly organized Czech police.
During the summer of 1945, Pokorný and many other senior Czechoslovakian officials organized both ethnic cleansing and expulsion against the Sudeten Germans.
In July 1945 Pokorný joined the Communist Party and was appointed commander of one of the intelligence service sections of the Ministry of Interior in Prague.
During the retribution, Pokorný led the investigation against many of the German war criminals, but he has since been accused of faking some testimonies and forging evidence to harm the communist party's opponents.
[1] In January 1951 Pokorný was arrested and in December 1953 sentenced in a show trial to 16 years imprisonment for sabotage, conspiracy, protection of former Gestapo agents and collaborators, and other activities, which supposedly hindered the work of the police.