▁doll ar ▁a ▁day , ▁and ▁forced ▁to ▁buy ▁prov isions ▁at ▁a ▁comm iss ary ▁that ▁charged ▁prices ▁twice ▁those ▁of ▁ret ail ers ▁in ▁the ▁area . ▁Sp ies ▁were ▁rec ru ited ▁to ▁inform ▁the ▁b oss ▁of ▁dis content ▁among ▁the ▁workers , ▁and ▁beat ings ▁were ▁admin ister ed ▁frequently ▁to ▁maintain ▁control ▁over ▁them . ▁ ▁In ▁ 1 9 3 6 , ▁the ▁U . S . ▁solic itor ▁general ▁announced ▁that ▁the ▁Justice ▁Department ▁was ▁again ▁looking ▁into ▁K nab b ▁Tur pent ine ▁employ ment ▁practices , ▁cit ing ▁numerous ▁compla ints ▁of ▁invol unt ary ▁serv itude ▁and ▁pe on age . ▁In ▁November ▁of ▁that ▁year , ▁William ▁and ▁Earl ▁K nab b , ▁Fred ▁Jones , ▁and ▁Ed ▁Hall ▁were ▁charged ▁with ▁viol ations ▁of ▁pe on age ▁laws ▁and ▁arrested ▁by ▁F BI ▁agents ▁and ▁U . S . ▁Marsh als . ▁ ▁They ▁ple aded ▁not ▁guilty ▁and ▁were ▁released ▁on ▁b onds ▁of ▁one ▁thousand ▁dollars ▁each . ▁ ▁Although ▁the ▁pro sec ution ▁proved ▁that ▁the ▁chief ▁witness ▁for ▁the ▁defense ▁at ▁the ▁trial ▁in ▁Jackson ville ▁had ▁per j ured ▁himself , ▁K nab b ▁and ▁his ▁co - def end ants ▁were ▁acqu itted ▁by ▁the ▁j ury . ▁ ▁Notes ▁ ▁External ▁links ▁ ▁Florida ▁State ▁Archive ▁photograph s ▁of ▁tur pent ine ▁cam ps ▁and ▁labor ers ▁ ▁Category : 1 9 2 3 ▁establish ments ▁in ▁Florida ▁Category : American ▁companies ▁established