any ▁County ▁District ▁Att orney ▁Paul ▁C ly ne ▁conven ed ▁a ▁grand ▁j ury ▁to ▁hear ▁testim ony ▁imp lic ating ▁Christopher ▁Por co ▁in ▁the ▁murder . ▁Those ▁who ▁were ▁reported ▁to ▁have ▁test ified ▁in ▁the ▁closed - session ▁hearing ▁included ▁Por co ' s ▁friends ▁from ▁college , ▁a ▁university ▁campus ▁safety ▁officer , ▁and ▁a ▁former ▁girl friend . ▁The ▁grand ▁j ury ▁would ▁field ▁more ▁testim ony ▁before ▁hand ing ▁up ▁an ▁ind ict ment ▁against ▁Christopher ▁in ▁November ▁ 2 0 0 5 , ▁one ▁year ▁after ▁the ▁attacks . ▁ ▁Burg l aries ▁During ▁the ▁course ▁of ▁their ▁investigation , ▁authorities ▁determined ▁that ▁Por co ▁had ▁a ▁history ▁of ▁anti - social ▁behavior ▁that ▁included ▁burg lar izing ▁his ▁parents ' ▁ ▁home . ▁In ▁ 2 0 0 5 , ▁Beth le hem ▁Police ▁detect ives ▁tra ve led ▁to ▁San ▁Diego , ▁California ▁to ▁retrieve ▁a ▁laptop ▁computer ▁that ▁Christopher ▁Por co ▁had ▁st olen ▁from ▁his ▁parents ▁in ▁a ▁break - in ▁on ▁July ▁ 2 1 , ▁ 2 0 0 3 . ▁Por co ▁had ▁sold ▁the ▁laptop ▁on ▁e B ay . ▁Police ▁cont ended ▁that ▁eight ▁months ▁earlier , ▁on ▁November ▁ 2 8 , ▁ 2 0 0 2 , ▁Christopher ▁st aged ▁a ▁burg l ary ▁at ▁his ▁parents ' ▁home ▁in ▁which ▁he ▁st ole ▁a ▁Mac int osh ▁laptop ▁computer ▁and ▁a ▁D ell ▁laptop ▁computer . ▁A ▁camera ▁reported ▁missing ▁from ▁the ▁burg