On 7 January 1938, she was eventually sentenced to 25 years in prison by the Military Collegium of the Supreme Court. After a hunger strike, she was held in isolation at Oryol Prison. On 11 September 1941 (three months after the German invasion of the USSR), Spiridonova, Izmailovich, Mayorov and over 150 other political prisoners (among them Christian Rakovsky and Olga Kameneva), were executed by order of Stalin in the Medvedevsky Forest massacre.