Carpenter v. United States

Carpenter v. United States (2018) was a Supreme Court case addressing privacy and digital data. The Court ruled that accessing a person's cell phone location history generally requires a warrant, because such information reveals detailed personal movements and activities. This decision highlighted that individuals have a reasonable expectation of privacy in their cell site location data, and law enforcement must follow the Constitution's protections against unreasonable searches when seeking this information from cellphone providers. The ruling marked a significant step in applying privacy rights to modern digital technologies.