At the end of the war, some well known convicts from the War-responsibility trials in Finland were kept in the prison, including President Risto Ryti, Prime Minister Väinö Tanner. The Estonian-born writer Hella Wuolijoki. was there for high treason during World War II. Another inmate of note was Martta Koskinen, a seamstress and communist spy convicted of high treason who was executed by a firing squad on September 29, 1943. She was the last woman executed in Finland.