Carpenter v. United States
A landmark 2018 United States Supreme Court ruling holding that government acquisition of historical cell-site location information from wireless carriers without a warrant violates the Fourth Amendment, establishing a constitutional protection framework against prolonged digital location tracking.
Core Facts
Timeline (last 90 days)
In the 2018 case Carpenter v. United States, the Supreme Court ruled that the government may not obtain weeks of a citizen's cell phone location records from telecommunications carriers without a warrant.
In 2018, the U.S. Supreme Court applied stronger privacy protections to cell phone location data in Carpenter v. United States.
The ruling in Carpenter v. United States primarily addressed cell-site location data, and whether it fully applies to ALPR systems remains a subject of legal dispute.
The Carpenter ruling explicitly excludes real-time or short-term data collection, leaving the legal status of ALPR data in a gray area.
In 2018, the U.S. Supreme Court ruled in Carpenter v. United States that cell-site location data spanning more than seven days can fully reconstruct an individual's movements and constitutes a 'search' in the constitutional sense, requiring a warrant.
In 2018, the U.S. Supreme Court ruled in Carpenter v. United States that law enforcement obtaining cell tower location data without a warrant constitutes an unconstitutional search.
The Carpenter ruling is a narrow decision that does not address real-time surveillance, foreign affairs, or security cameras, so whether ALPR data is protected by it still needs to be defined on a case-by-case basis.
All Facts (8)
In the 2018 case Carpenter v. United States, the U.S. Supreme Court established that the aggregation of continuous location data constitutes a substantial intrusion into personal privacy, and government access is subject to Fourth Amendment constraints.
75%UnverifiedIn the 2018 case Carpenter v. United States, the Supreme Court ruled that the government may not obtain weeks of a citizen's cell phone location records from telecommunications carriers without a warrant.
50%UnverifiedIn 2018, the U.S. Supreme Court applied stronger privacy protections to cell phone location data in Carpenter v. United States.
50%UnverifiedThe ruling in Carpenter v. United States primarily addressed cell-site location data, and whether it fully applies to ALPR systems remains a subject of legal dispute.
50%UnverifiedThe Carpenter ruling explicitly excludes real-time or short-term data collection, leaving the legal status of ALPR data in a gray area.
50%UnverifiedIn 2018, the U.S. Supreme Court ruled in Carpenter v. United States that law enforcement obtaining cell tower location data without a warrant constitutes an unconstitutional search.
50%UnverifiedThe Carpenter ruling is a narrow decision that does not address real-time surveillance, foreign affairs, or security cameras, so whether ALPR data is protected by it still needs to be defined on a case-by-case basis.
50%UnverifiedIn 2018, the U.S. Supreme Court ruled in Carpenter v. United States that cell-site location data spanning more than seven days can fully reconstruct an individual's movements and constitutes a 'search' in the constitutional sense, requiring a warrant.
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