Your Google search history can be used against you in court. Does that violate the Constitution?

Criminal investigators hoping to develop suspects in difficult cases have been asking Google to reveal who searched for specific information online, seeking “reverse keyword” warrants that critics warn threaten the privacy of innocent people.

Unlike traditional search warrants that target a known suspect or location, keyword warrants work backward by identifying internet addresses where searches were made in a certain window of time for particular terms, such as a street address where...