Meaning: This sentence sets the stage for a mystery story, where the detective is tasked with finding clues to solve a crime.
Choice of Words: Carefully is an adverb that describes the manner in which the detective examined the crime scene. Examined is a verb that describes the detective's actions. Crime scene is a noun that refers to the location where the crime took place. Clues are nouns that refer to pieces of evidence that can help solve the crime.