"Professor Pucefoot immediately begins drawing a pointless chalk outline around the body, as is standard protocol."
— Homestuck, describing the trope in a single sentence
Twilight Sparkle: Why is there tape all over the grass?
Inspector Jacques Clouseau: (about Bizu—dead) Don't you find it a bit of a coincidence that the body fell perfectly within the chalk outline on the floor?
Gilbert Ponton: I think they drew the chalk outline after he was shot.