| sleuth(noun, agent, informer, reporter) |
| dick(agent, police, informer, reporter) |
| Sherlock Holmes(expression, agent, police, informer) |
| agent(informer, reporter, gumshoe, investigator) |
| analyst(agent, informer, reporter, gumshoe) |
| bird dog(expression, agent, police, informer) |
| bull(agent, informer, reporter, gumshoe) |
| constable(agent, informer, reporter, gumshoe) |
| cop(agent, informer, reporter, gumshoe) |
| eavesdropper(noun, agent, informer, reporter) |
| eye(noun, agent, informer, reporter) |
| fed(agent, police, informer, reporter) |
| fink(agent, informer, reporter, gumshoe) |
| flatfoot(agent, police, informer, reporter) |
| gumshoe(agent, informer, reporter, investigator) |
| informer(noun, agent, gumshoe, investigator) |
| nark(agent, police, informer, reporter) |
| peeper(agent, police, informer, reporter) |
| plainclothes officer(expression, agent, police, informer) |
| police officer(expression, agent, informer, reporter) |