Synonyms to investigator

observer, TV-viewer, ace, air force, beholder, bird-watcher, bomber pilot, bystander, combat pilot, drugstore cowboy, examinant, examiner, eyewitness, fighter pilot, flyboy, gaper, gazer, gazer-on, girl-watcher, goggler, inspector, kibitzer, looker, looker-on, military pilot, naval pilot, ogler, onlooker, perceiver, percipient, scrutineer, seer, sidewalk superintendent, spectator, spectatress, spectatrix, suicide pilot, televiewer, television-viewer, tester, video-gazer, viewer, visitator, visitor, watcher, witness, analyst, analyzer, assayer, essayer, experimenter, research worker, researcher, test driver, test pilot, tryer-out, detective, Bow Street runner, FBI, FBI agent, Federal, G-man, MP, Secret Service, Sherlock, Sherlock Holmes, T-man, asker, bailiff, beadle, beagle, bound bailiff, captain, catchpole, catechist, chief of police, commissioner, constable, cop, copper, cross-interrogator, cross-questioner, deputy, deputy sheriff, dick, eye, fed, federal, flic, gendarme, government man,