Zvaničnici su obično pribjegavali metodima koji ne ostavljaju nikakve fizičke tragove, poput šamaranja, skidanja i zavezivanja očiju, uskraćivanja hrane i sna, izolacije, prijetnje i lažnih pogubljenja.
Officials usually resorted to methods that would leave no physical traces, such as slapping, stripping and blindfolding, food and sleep deprivation, isolation, threats and mock executions.