ghost
n.— «The two are known as “ghosts,” in police parlance, or undercover officers whose job is to keep an eye on and provide back-up to a third undercover officer who is doing the buy-and-bust work.» —“Man Shot Dead by Police on Lafayette” The Local (Fort Greene, Brooklyn, New York) July 11, 2009. (source: Double-Tongued Dictionary)
Further reading
Whether it’s a Rubik’s cube or a round of Wordle, why do so many of us find puzzles irresistible? A new book celebrates the allure and psychological benefits of brain teasers. Plus, powerful language for talking about the chronic...
Martha recently found a 1938 letter that her grandfather sent to the local police chief in Virginia’s Shenandoah Valley. It concerns a suspected thief who her grandfather thought might be persuaded to confess because, he wrote,, the young man surely...