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.
V lednu 1951 byl Pokorný zatčen a v prosinci 1953 odsouzen ve vykonstruovaném procesu na 16 let za sabotáž, spiknutí a spolupráci s bývalými agenty gestapa a udavači, kterou mařil práci policie.