ation ▁ ▁Anthony ▁E . ▁Zu iker , ▁who ▁created ▁the ▁show , ▁lo os ely ▁based ▁Gr iss om ▁on ▁real ▁life ▁Las ▁Veg as ▁Metropolitan ▁Police ▁Department ▁criminal ist ▁Daniel ▁Hol stein . ▁Zu iker ▁was ▁" f asc in ated " ▁by ▁Hol stein , ▁who , ▁like ▁Gr iss om , ▁kept ▁mag g ots ▁and ▁p ig ' s ▁blood ▁in ▁his ▁re fr iger ator . ▁Hol stein ▁worked ▁as ▁a ▁consult ant ▁for ▁the ▁show . ▁Zu iker ▁originally ▁named ▁the ▁character ▁Gil ▁She in baum , ▁but ▁after ▁he ▁became ▁part ▁of ▁the ▁cast , ▁William ▁Peters en ▁requested ▁the ▁name ▁to ▁be ▁changed . ▁Peters en ▁and ▁Zu iker ▁decided ▁to ▁rename ▁the ▁character ▁" Gr iss om ," ▁after ▁astr onaut ▁G us ▁Gr iss om , ▁of ▁whom ▁Peters en ▁was ▁a ▁great ▁adm ir er . ▁The ▁name ▁Gil ▁came ▁from ▁one ▁of ▁the ▁actor ' s ▁h obb ies , ▁fish ing . ▁ ▁In ▁ 2 0 0 0 , ▁CBS ▁had ▁bought ▁the ▁pilot ▁script ▁from ▁Zu iker , ▁and ▁N ina ▁T ass ler , ▁CBS ' s ▁head ▁of ▁drama ▁development , ▁passed ▁it ▁on ▁to ▁Peters en , ▁who ▁had ▁a ▁pay ▁or ▁play ▁contract ▁with ▁the ▁network . ▁Peters en ▁has ▁said ▁that ▁many ▁TV ▁shows ▁were ▁offered ▁to ▁him ▁over ▁the ▁years , ▁but ▁he ▁" did n ' t ▁want ▁to ▁get ▁locked ▁down ." ▁However , ▁he ▁was ▁im pressed ▁with