Learn what "what exactly does the detective know" means, when people say it, and how to use it naturally in English.

This asks for specific information about what someone knows, with suspicion or urgency.
From I Think My Wife Wants To Kill Me S2, Episode 7
Someone questions what a detective may know about the situation.
Use it when trying to find out how much a person knows about a case or secret. It works well in mystery or investigative contexts.
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