▁the ▁opening ▁scene ▁of ▁S aw ▁IV , ▁Hoff man ▁is ▁called ▁to ▁the ▁police ▁m org ue ▁to ▁hear ▁a ▁c ass ette ▁t ape ▁that ▁is ▁found ▁in ▁J igs aw ' s ▁st om ach ▁during ▁his ▁aut ops y . ▁It ▁is ▁later ▁discovered ▁that ▁the ▁events ▁of ▁S aw ▁III ▁and ▁S aw ▁IV ▁occurred ▁at ▁the ▁same ▁time , ▁so ▁this ▁scene ▁actually ▁happened ▁after ▁the ▁events ▁of ▁those ▁two ▁films . ▁ ▁Prior , ▁Hoff man ▁knock s ▁out ▁Officer ▁Daniel ▁R igg ▁and ▁makes ▁it ▁seem ▁that ▁Eric ▁Matt he ws ▁and ▁he ▁have ▁been ▁captured ▁by ▁J igs aw , ▁and ▁that ▁R igg ▁must ▁save ▁them ▁both . ▁R igg ▁comple tes ▁a ▁series ▁of ▁tests , ▁leading ▁him ▁to ▁J igs aw ' s ▁la ir ▁and ▁the ▁location ▁of ▁Hoff man ▁and ▁Eric ' s ▁trap . ▁Despite ▁previous ▁warnings ▁to ▁not ▁go ▁through ▁un sec ured ▁doors , ▁R igg ▁enters ▁the ▁room ▁of ▁their ▁trap ▁before ▁the ▁timer ▁exp ires , ▁causing ▁Eric ' s ▁death ▁and ▁apparently ▁killing ▁Hoff man ▁as ▁well . ▁However , ▁Hoff man ▁releases ▁himself ▁from ▁his ▁b onds , ▁having ▁never ▁been ▁in ▁any ▁danger , ▁and ▁reve als ▁himself ▁as ▁J igs aw ' s ▁second ▁accomp lice . ▁Hoff man ▁leaves ▁R igg ▁to ▁die ▁ ▁and ▁wal ks ▁out ▁of ▁the ▁room . ▁The ▁m org ue ▁scene ▁re plays ▁with ▁a ▁more ▁detailed ▁message ▁to ▁Hoff man , ▁stating