If the government puts a GPS tracker on you, your car, or any of your personal effects, it counts as a search—and is therefore protected by the Fourth Amendment.
The Supreme Court clarified and affirmed that law on Monday, when it ruled on Torrey Dale Grady v. North Carolina, before sending the case back to that state’s high court. The Court’s short but unanimous opinion helps make sense of how the Fourth Amendment, which protects against unreasonable search and seizure, interacts with the expanding technological powers of the U.S. government.
“It doesn’t matter what the context is, and it doesn’t matter whether it’s a car or a person. Putting that tracking device on a car or a person is a search,” said Jennifer Lynch, a senior staff attorney at the Electronic Freedom Foundation (EFF).