If so, you should. If you have ever used a search engine to find information that could be used in a criminal or legal case, then you are in trouble. The search history of most people is filled with mundane-looking things like website addresses and contact information. But if those items are connected to criminal activity, then your search history could land you in hot water. There are a few different ways that the government can use your search history to build profiles of people and track their movements. You may also Incidently find out about criminal activity if someone has been using your search engine for illegal purposes.