The phrase has long been tied to British television detective drama, where a murder announcement signals the start of an investigation and sets a grim tone in a single line. As clip culture grew, that familiar seriousness made it easy to lift out of context and reuse as a reaction for reveals and accusations. It now circulates alongside other crime drama cues such as the Law and Order DUN DUN, with creators borrowing the authority of a TV investigation to make small, everyday discoveries sound far more serious than they are.