Verified75% confidenceFactExact time
The 2018 case Carpenter v. United States ruled that obtaining long-term cell phone location records requires a warrant, partially limiting the third-party doctrine.
5
Sources
75%
Confidence
Long-term
Relevance
8/16/2026
First Seen
Sources
Related Claims
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.78% similarUnverifiedThe 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.74% similarUnverifiedIn 2018, the U.S. Supreme Court applied stronger privacy protections to cell phone location data in Carpenter v. United States.71% similarVerifiedIn 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.70% similarUnverified第三方原则源于1979年的Smith v. Maryland案，最高法院裁定电话拨号记录不受第四修正案保护，因为用户自愿将号码信息传递给电信公司60% similar
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