Military Collegium of the Supreme Court of the USSR
On 20 June 1938, Marchak was arrested and accused of belonging to an anti-Soviet Trotskyist organization. On 23 September 1938, Marchak was found guilty by the Military Collegium of the Supreme Court of the USSR and was sentenced to death. Marchak was rehabilitated by the resolution of the Military Collegium of the Supreme Court of the USSR of 17 June 1958.