Friedrich Glauser spent one year as an "administrative inmate" in Witzwil 1925 to 1926 and tried to commit suicide.
Shortly after the end of the World War II Witzwil attained its maximum capacity with 600 prisoners.
1998 followed the opening of the department “Ausschaffung” for 36 people bound to be forcefully repatriated back to their country of origin.
[4] Beginning in the 1990s, the government also constructed an annex at Witzwil, which currently serves as expulsion prison, or a detainment facility for individuals waiting to be deported, pending a court ruling or police decree.
[5] With a total agricultural land area of 612 hectares, the prison has the largest farm in Switzerland, with an annual revenue of 17 million Swiss francs.