Stefan Michnik (28 September 1929 – 27 July 2021[2]) was a military judge of the Soviet-dominated regime in post-World War II Poland, and a captain in the communist Polish People's Army.

[5] After the collapse of communism in Poland (1989), Michnik was formally implicated by the Polish justice system in communist crimes relating to his tenure as a military judge.

[6] At the beginning of 1951 Michnik was assigned a position with the Warsaw Regional Military Court (Wojskowy Sąd Rejonowy, WSR) and two weeks later imposed his first sentence against Stanisław Bronarski,[6] charged with anticommunist activities, while he was a member of the AK, NSZ and NZW.

He lived as a retired librarian in a small town of Storvreta near Uppsala[1][11] He built connections with Radio Free Europe and the Paris-based Kultura, where he wrote articles under the anonym "Karol Szwedowicz".

On 8 November 2018, the Military Court in Warsaw issued for the second time a European Arrest Warrant in connection with 30 offences that Michnik committed in the years 1952–53 against representatives of the democratic opposition and former members of the Underground State, including unlawful death sentences.