ed ▁it ▁out ▁of ▁Reg an ' s . ▁ ▁Leg ion ▁In ▁the ▁sequ el , ▁Leg ion , ▁it ▁is ▁revealed ▁that ▁after ▁the ▁demon ▁depart ed , ▁another ▁evil ▁spirit ▁inv aded ▁K arr as ' s ▁body . ▁ ▁K arr as ▁was ▁found ▁wand ering ▁and ▁am nes iac ▁and ▁was ▁placed ▁in ▁the ▁care ▁of ▁a ▁mental ▁hospital ▁near ▁Washington , ▁D . C . ▁ ▁While ▁in car cer ated ▁there , ▁the ▁spirit ▁suppress es ▁K arr as ' s ▁person ality ▁and ▁makes ▁for ays ▁into ▁the ▁bodies ▁of ▁other ▁patients ▁in ▁order ▁to ▁commit ▁a ▁series ▁of ▁rit ual ▁mur ders . ▁ ▁Ada pt ations ▁In ▁the ▁films ▁The ▁Ex or c ist ▁and ▁The ▁Ex or c ist ▁III , ▁he ▁is ▁played ▁by ▁Jason ▁Miller ▁( who ▁was ▁in ▁fact ▁educated ▁at ▁the ▁Jes uit ▁University ▁of ▁Sc r anton ). ▁ ▁Jack ▁Nich ol son ▁was ▁up ▁for ▁the ▁part ▁of ▁K arr as ▁before ▁St acy ▁K each ▁was ▁h ired ▁by ▁Bl at ty . ▁According ▁to ▁The ▁Ex or c ist ▁director ▁William ▁Fried kin , ▁Paul ▁New man ▁also ▁wanted ▁to ▁port ray ▁K arr as . ▁ ▁Fried kin ▁then ▁sp otted ▁Miller ▁following ▁a ▁performance ▁of ▁Miller ' s ▁play ▁That ▁Championship ▁Season ▁in ▁New ▁York . ▁Even ▁though ▁Miller ▁had ▁never ▁acted ▁in ▁a ▁film , ▁K each ' s ▁contract ▁was ▁bought ▁out ▁by ▁Warner ▁Brothers , ▁and ▁Miller ▁was ▁signed