▁with ▁him . ▁The ▁Chief ▁of ▁Det ect ives , ▁Br igh am ▁S inc la ir , ▁in ▁a ▁bid ▁to ▁remove ▁Mac ▁from ▁his ▁position ▁at ▁the ▁lab ▁( for ▁political ▁reasons , ▁as ▁Mac ▁bel ieves ), ▁initi ates ▁an ▁In ternal ▁Affairs ▁investigation , ▁even ▁though ▁the ▁district ▁att orney ▁did ▁not ▁find ▁enough ▁evidence ▁to ▁charge ▁Mac ▁( ep is ode ▁ 3 . 2 2 ▁" C old ▁Re ve al "). ▁During ▁the ▁hearing , ▁the ▁pro sec utor ▁appears ▁to ▁be ▁determined ▁to ▁destroy ▁Mac ' s ▁career , ▁despite ▁attempts ▁by ▁his ▁colle agues ▁to ▁aid ▁him ▁in ▁their ▁testim ony . ▁Form er ▁Det ect ive ▁Tr uby ▁calls ▁Taylor ▁from ▁j ail , ▁des iring ▁to ▁meet ▁him ▁in ▁person . ▁During ▁the ▁visit , ▁Tr uby , ▁guilty ▁over ▁Dob son ' s ▁release , ▁offers ▁Mac ▁a ▁tr ump ▁card ▁to ▁play ▁against ▁Deput y ▁Ins pect or ▁G err ard ▁and ▁S inc la ir : ▁When ▁Dob son ▁had ▁originally ▁been ▁arrested ▁several ▁years ▁previously , ▁G err ard , ▁then ▁a ▁lieutenant , ▁failed ▁to ▁remove ▁Dob son ' s ▁bel t . ▁Dob son ▁used ▁the ▁bel t ▁in ▁a ▁suic ide ▁attempt ▁in ▁his ▁cell . ▁G err ard ▁and ▁S inc la ir , ▁the ▁prec inct ▁captain , ▁covered ▁up ▁the ▁suic ide ▁attempt ▁as ▁well ▁as ▁G err ard ' s ▁lap se ▁in ▁procedure . ▁Mac ▁confront s ▁the ▁two ▁and