In re Telephone Information Needed for a Criminal Investigation
119 F. Supp. 3d 1011
N.D. Cal.2015Background
- Government sought historical cell-site location information (CSLI) for multiple target cell phones for a 60‑day period under 18 U.S.C. § 2703(d); magistrate judge denied the request.
- CSLI is generated when a handset communicates with cell towers: during calls, texts, data, and also via automatic "pinging" and background apps; modern cell networks and microcells can yield highly precise location data.
- The government relied on the Stored Communications Act (SCA) § 2703(d) court‑order process (a lower "specific and articulable facts" standard) rather than a § 2703(c)(1)(A) warrant.
- Key dispute: whether obtaining historical CSLI from a provider is a Fourth Amendment "search," and if so whether the third‑party doctrine (Miller/Smith) removes users' expectation of privacy.
- The district court held (de novo review) that users have a reasonable expectation of privacy in historical CSLI and that Miller/Smith do not control because CSLI is often passively generated and may be recorded by multiple carriers (roaming); accordingly the government must obtain a warrant supported by probable cause.
Issues
| Issue | Government's Argument | Public Defender / Amici's Argument | Held |
|---|---|---|---|
| Whether obtaining historical CSLI is a Fourth Amendment "search" | CSLI is business records the user "voluntarily conveys" to carriers; third‑party doctrine (Miller/Smith) controls so no search | CSLI is often passively generated (pings, background apps, incoming/unanswered calls), and can reveal detailed movement over time; users retain a privacy expectation | Obtaining historical CSLI is a Fourth Amendment search; users have a reasonable expectation of privacy in it |
| Whether the third‑party doctrine (Miller/Smith) defeats privacy in CSLI | Miller/Smith govern because users know calls require tower signaling and thus voluntarily convey location info to providers | Miller/Smith inapplicable: CSLI is not voluntarily conveyed when generated passively (pings, apps, roaming, unsolicited calls) and users often do not know which provider collects data | Third‑party doctrine does not defeat the expectation of privacy here; Miller/Smith do not control |
| Whether published carrier privacy policies constitute user consent to government access | Policies disclose that carriers may comply with legal process; thus users implicitly consent | Policies are vague about what is collected, retention, volume, and do not cover CSLI held by other carriers (roaming); they do not constitute informed consent to government acquisition of 60 days of CSLI | Privacy policies do not supply consent adequate to avoid warrant requirement |
| Whether § 2703(d) court orders (specific and articulable facts standard) permit warrantless access to historical CSLI | § 2703(d) authorizes a court order on the lesser "specific and articulable facts" showing; that statutory process is sufficient | Relying on § 2703(d) would permit constitutionally problematic warrantless intrusions; magistrates may require a warrant where Constitution demands it | § 2703(d) does not eliminate magistrate discretion; for historical CSLI the Fourth Amendment requires a probable‑cause warrant (the government may still use § 2703(c)(1)(A) warrant procedure) |
Key Cases Cited
- Riley v. California, 134 S. Ct. 2473 (2014) (cell phones differ qualitatively; warrants generally required for searches of phones)
- United States v. Jones, 132 S. Ct. 945 (2012) (long‑term electronic location monitoring raises Fourth Amendment concerns)
- Katz v. United States, 389 U.S. 347 (1967) (reasonable expectation of privacy test)
- United States v. Miller, 425 U.S. 435 (1976) (third‑party doctrine for voluntarily conveyed bank records)
- Smith v. Maryland, 442 U.S. 735 (1979) (pen‑register numbers not protected by Fourth Amendment)
- In re Application of the U.S. for an Order Directing a Provider of Elec. Commc'n Serv. to Disclose Records to Gov't, 620 F.3d 304 (3d Cir. 2010) (magistrates may require warrants; third‑party doctrine not dispositive for CSLI)
- In re U.S. for Historical Cell Site Data, 724 F.3d 600 (5th Cir. 2013) (held Smith controls for call‑generated CSLI under facts before that court)
- United States v. Davis, 785 F.3d 498 (11th Cir. 2015) (en banc) (applied third‑party doctrine to CSLI generated during calls under the 2010 factual record)