8 th ▁Cir . 1 9 5 6 ), ▁was ▁a ▁case ▁where ▁the ▁pla int iffs ▁challeng ed ▁the ▁authority ▁of ▁Indian ▁trib al ▁courts ; ▁the ▁matter ▁involving ▁both ▁ad ul tery ▁and ▁tax ▁assess ment ▁was ▁heard ▁by ▁the ▁United ▁States ▁Court ▁of ▁App e als ▁for ▁the ▁E ighth ▁Circ uit . ▁ ▁Two ▁of ▁the ▁pla int iffs , ▁both ▁en rolled ▁members ▁of ▁the ▁O gl ala ▁Si oux ▁Tri be , ▁Marie ▁Little ▁F inger ▁and ▁David ▁Black ▁Cat ▁were ▁tried ▁and ▁conv icted ▁in ▁the ▁O gl ala ▁Si oux ▁Trib al ▁court ▁of ▁the ▁crime ▁of ▁ad ul tery , ▁under ▁the ▁Re vised ▁Code ▁of ▁the ▁O gl ala ▁Si oux ▁Tri be . ▁The ▁third ▁pla int iff ▁in ▁the ▁case ▁Thomas ▁Iron ▁Crow , ▁also ▁an ▁en rolled ▁member ▁of ▁the ▁O gl ala ▁Si oux ▁Tri be ▁challeng ed ▁the ▁juris diction ▁of ▁the ▁trib al ▁court ▁to ▁en force ▁the ▁collection ▁of ▁a ▁tax ▁ass essed ▁against ▁parties ▁who ▁were ▁non - members ▁of ▁the ▁tribe ▁who ▁le ased ▁gra zing ▁rights ▁from ▁him ▁on ▁his ▁allocated ▁land ▁on ▁the ▁res ervation . ▁ ▁The ▁Trib al ▁Court ▁claimed ▁juris diction ▁over ▁the ▁matter ▁based ▁on ▁the ▁fact ▁that ▁both ▁Little ▁F inger ▁and ▁Black ▁Cat ▁were ▁en rolled ▁members ▁of ▁the ▁O gl ala ▁Si oux ▁Tri be , ▁and ▁that ▁their ▁alleg ed ▁ind is cret ion ▁occurred ▁on ▁the ▁P ine ▁R idge ▁Res ervation .