This field report was assigned the following topical and geographical subject headings by the RFE/RL: Czechoslovakia; Police and Security -- Atrocities; Police and Security -- Security Measures; Prisons and Camps -- Conditions and Security Measures; Prisons and Camps -- Personnel and Guards; Prisons and Camps -- Jachymov; Prisons and Camps -- Atrocities; Police and Secur