Case5:15-xr-90304-HRL Document30 Filed07/29/15 Page29 of 46
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b. The Factual Record Before the Fifth and Eleventh Circuits Did Not Include
Continually Running Apps and Automatic Pinging
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This conclusion is not at odds with the decisions of the Fifth and Eleventh Circuits because
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the factual record in those cases was materially different. Both cases involved technology from
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2010 and were expressly limited to instances where a cell phone user was either making or
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receiving a call. The Fifth Circuit, for example, held that Smith controlled the analysis because a
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cell phone user “understands that his cell phone must send a signal to a nearby cell tower in order
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to wirelessly connect his call,” and therefore “voluntarily conveys his cell site data each time he
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makes a call.” Fifth Circuit Opinion, 724 F.3d at 612-14.
United States District Court
Northern District of California
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Similarly, the Eleventh Circuit en banc held that the “longstanding third-party doctrine
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plainly controls the disposition of this case” because “[c]ell phone users voluntarily convey cell
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tower location information to telephone companies in the course of making and receiving calls on
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their cell phones.” Davis, 785 F.3d at 512 & n.12. “Just as in Smith,” the Eleventh Circuit
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continued, “users could not complete their calls without necessarily exposing this information to
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the equipment of third-party service providers.” Id. at 512 n.12.
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Neither circuit, however, had occasion to address whether a cell phone user voluntarily
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conveys her location to a cellular service provider when the historical CSLI is generated by
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continuously operating apps or automatic pinging. The Fifth Circuit’s decision only contemplated
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instances where the cell phone user “makes a call.” Fifth Circuit Opinion, 724 F.3d at 614. The
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Fifth Circuit may have limited its analysis in this way because, according to the government there,
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“cell phone service providers do not create cell site records when a phone is in an idle state.” Id.
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at 602 n.1. This is contrary to the factual record here, which indicates that “CSLI for a cellular
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telephone may still be generated in the absence of user interaction with a cellular telephone.”
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Luna Decl. ¶ 3B. “For example,” the government’s FBI special agent explained, “CSLI may still
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be generated” by “applications that continually run in the background that send and receive data
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(e.g. email applications).” Id.
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The Fifth Circuit’s analysis may also have been so limited because the government’s
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Case No. 15-XR-90304-HRL-1(LHK)
ORDER AFFIRMING DENIAL OF APPLICATION FOR HISTORICAL CELL SITE LOCATION
INFORMATION
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