store detective(n = noun.person) - a private detective employed by a merchant to stop pilferage;
is a kind of operative, pi, private detective, private eye, private investigator, shamus, sherlock

buffer store, building supply store, candy store, chain store, cigar store, clothing store, computer store, convenience store, country store, department store, detective, detective agency, detective novel, detective story, detective work, dime store, discount store, flower store, general store, grocery store, haberdashery store, hardware store, hotel detective, house detective, in store, jewelry store, liquor store, mens store, ordnance store, package store, police detective, powder store, private detective, push-down store, retail store, second-hand store, shoe store, specialty store, store, store cheese, variety store