The answer is yes if you are on a public road. For instance, you cut your grass and drink a few beers. You then decide to be a nice neighbor and drive down the street to cut you neighbor’s lawn. If you get pulled over on your street, you are subject to the same drinking and driving rules that govern the operation of your car. You can get a DWI/DUI and end up in criminal court defending the charges.

Why Are Grand Jury Proceedings Secret? Who Has the Authority to Unseal Them?
Grand juries play a critical role in the U.S. justice system. They decide whether enough evidence exists to bring criminal charges, often in high-profile cases