▁Pos ing ▁as ▁a ▁respond ing ▁officer , ▁she ▁intended ▁to ▁kill ▁Ch au ▁and ▁Qu oc ▁in ▁order ▁to ▁ensure ▁there ▁would ▁be ▁no ▁witness es . ▁Park ing ▁in ▁the ▁rear , ▁Frank ▁entered ▁through ▁the ▁back ▁door ▁of ▁the ▁restaurant ▁and ▁made ▁her ▁way ▁through ▁the ▁kitchen ▁to ▁the ▁d ining ▁room , ▁where ▁Ch au ▁waited ▁for ▁help ▁at ▁the ▁front ▁door . ▁As ▁Ch au ▁bol ted ▁through ▁the ▁restaurant ' s ▁front ▁door ▁to ▁the ▁safety ▁of ▁arriv ing ▁officers , ▁Frank ▁immediately ▁identified ▁herself ▁as ▁a ▁police ▁officer . ▁Ch au ▁told ▁Frank ▁that ▁she ▁knew ▁what ▁she ▁had ▁done ▁and ▁cried ▁to ▁the ▁officers ▁that ▁Frank ▁had ▁committed ▁the ▁cr imes . ▁ ▁Edd ie ▁R ant z , ▁the ▁hom ic ide ▁detect ive ▁who ▁worked ▁the ▁case , ▁believed ▁Frank ▁and ▁Lac aze ▁planned ▁the ▁rob ber y ▁to ▁get ▁reven ge ▁on ▁Williams . ▁Frank ▁believed ▁Williams ▁was ▁short ch anging ▁her ▁on ▁hours ▁and ▁pay ▁at ▁the ▁Kim ▁An h , ▁and ▁wanted ▁reven ge . ▁R ant z ▁subsequently ▁described ▁Frank ▁as ▁the ▁most ▁cold - heart ed ▁person ▁he ' d ▁ever ▁encountered ▁in ▁three ▁dec ades ▁as ▁an ▁officer . ▁ ▁Ch au ▁and ▁Frank ▁were ▁question ed ▁in ▁detail ▁while ▁se ated ▁at ▁different ▁tables ▁in ▁the ▁restaurant . ▁ ▁Frank ▁was ▁arrested ▁and ▁charged ▁with ▁three ▁counts ▁of ▁first ▁degree ▁murder . ▁Lac aze ▁was ▁arrested ▁and ▁charged ▁later ▁that ▁night . ▁Frank ▁was ▁taken ▁to