| Carpenter v. United States | |
|---|---|
 | |
| Argued November 29, 2017 Decided June 22, 2018 | |
| Full case name | Timothy Ivory Carpenter v. United States of America |
| Docket no. | 16-402 |
| Citations | 585 U.S. 296 (more) 138 S. Ct. 2206; 201 L. Ed. 2d 507 |
| Argument | Oral argument |
| Opinion announcement | Opinion announcement |
| Decision | Opinion |
| Case history | |
| Prior | United States v. Carpenter, No. 2:12-cr-20218 (E.D. Mich. 2013). Affirmed, United States v. Carpenter, 819 F.3d 880 (6th Cir. 2016). |
| Subsequent | Affirmed, 926 F.3d 313 (6th Cir. 2019). Remanded for resentencing, 788 Fed. Appx. 364 (6th Cir. 2019). |
| Questions presented | |
| Whether the warrantless seizure and search of historical cell phone records revealing the location and movements of a cell phone user over the course of 127 days is permitted by the Fourth Amendment. | |
| Holding | |
| Government acquisition of cell-site records is a search under the Fourth Amendment, and, thus requires a warrant. | |
| Court membership | |
| |
| Case opinions | |
| Majority | Roberts, joined by Ginsburg, Breyer, Sotomayor, Kagan |
| Dissent | Kennedy, joined by Thomas, Alito |
| Dissent | Thomas |
| Dissent | Alito, joined by Thomas |
| Dissent | Gorsuch |
| Laws applied | |
| U.S. Const. amend. IV | |
Carpenter v. United States, 585 U.S. 296 (2018), is a landmark United States Supreme Court case concerning the privacy of historical cell site location information (CSLI). The Court held that the government violates the Fourth Amendment to the United States Constitution when it accesses historical CSLI records containing the physical locations of cellphones without a search warrant.[1]
Prior to Carpenter, government entities could obtain cellphone location records from service providers by claiming the information was required as part of an investigation. After Carpenter, government entities are required to obtain a search warrant to access that information. Recognizing the influence of new consumer communications devices in the 2010s, the Court expanded its conceptions of constitutional rights toward the privacy of this type of data. However, the Court emphasized that the Carpenter ruling was narrowly restricted to the precise types of information and search procedures that were relevant to Carpenter's complaint.[2][3]
- ^ Carpenter v. United States, 138 S. Ct. 2206 (2018).
- ^ Ng, Alfred (June 22, 2018). "Supreme Court says warrant necessary for phone location data in win for Privacy". cnet.com. Archived from the original on June 22, 2018. Retrieved June 22, 2018.
- ^ "Cell Site Location Information: A Guide for Criminal Defense Attorneys" (PDF). Electronic Frontier Foundation. March 28, 2019. Archived (PDF) from the original on October 24, 2020. Retrieved January 22, 2021.