On 7 March 1945, Fieldorf was arrested by the Soviet
NKVD in the town of
Milanówek. Initially, he was misidentified under the name
Walenty Gdanicki and sent to a
Gulag camp in the
Ural Mountains. Released in 1947, he returned to new Poland ruled by the communist
Polish Workers' Party government and the increasingly repressive
Ministry of Public Security. He settled in
Biała Podlaska under his assumed name and did not return to underground activities. Moving between Warsaw and Kraków, he eventually settled in
Łódź. The government, which was persecuting former resistance members loyal to the
London-based government-in-exile, offered an
amnesty to them, in 1948. Not knowing that the amnesty was a sham, Fieldorf outed himself to the authorities. He was then placed under investigatory arrest in Warsaw. In prison, he refused to collaborate with the Communist security services, even under torture. General Fieldorf's brutal interrogations were personally supervised by
MBP colonel
Józef Różański. Kazimierz Gorski, Polish secret police, the
UB interrogator, testified in 1997: "[Józef] Różański would stop by frequently during many of my interrogations of general [August] Fieldorf, and he would have conversations with him on many subjects. The prosecuting attorney Benjamin Wajsblech would show up frequently as well, and would, on many occasions, give me verbal instructions. I prepared a decision to refuse the general's [defense] evidence materials. I wrote it under the dictation of Wajsblech. I didn't decide as to whom, and how, I should interrogate". Fieldorf was accused by prosecutor
Helena Wolińska-Brus of being a "fascist-Hitlerite criminal" and having ordered an execution of
Soviet partisans while serving in the AK. After a
kangaroo court trial, he was sentenced to death on 16 April 1952 by the presiding judge
Maria Gurowska. An appeal to a higher court failed, and the family's plea for a pardon was denied by then the communist leader
Bolesław Bierut who refused to grant
clemency. The sentence was carried out, by hanging, on 24 February 1953 at 3:00 pm in the
Mokotów Prison in Warsaw. The Communist Prosecuting Attorney, Wiktor Gattner, described General Fieldorf's last moments as follows: I asked the condemned if he had any wishes. Fieldorf responded: 'Please notify my family'. I stated that his family would be notified [...] The condemned persistently looked straight into my eyes. He stood erect. No one was holding him. He made an appearance of a very strong man. One would almost admire his composure amidst such dramatic events. He neither screamed, nor made any gestures. I said: Carry out [the execution]! The executioner and one of the guards approached the condemned […] I went to see the warden afterwards, and then by my own hand I prepared the protocol of the execution. General Fieldorf's body was never returned to his family, and was buried in a location which remains unknown. In 2009, an article in a British
Telegraph newspaper suggested that Fieldorf was buried in a mass grave in a Warsaw cemetery, together with the remains of 248 other murdered Polish non-communists. at Warsaw's
Powązki Cemetery In 1958, the prosecutor's office discontinued any further investigations. == Commemorating and recognition ==