Chatrie v. United States · ¶45

And next, Location History also allows police officers to reconstruct “retrospective[ly],” and with no real effort, people’s comings and goings in any area. Id., at 312. As with CSLI, the Government need not decide in advance the kind of surveillance it should undertake, whether of a person or a site. “Whoever the suspect turns out to be,” Carpenter said of CSLI, “he has effectively been tailed every moment of every day.” Ibid. Likewise, as this case shows, wherever a location of interest turns out to be (whether a crime scene or a protest march or even a private home), it has effectively been surveilled for the same boundless time. Google’s Location History will be available to chart the movements of many individuals—or a few or one—within the vicinity, again at the “click of a button.” Id., at 311. Recall that in Jones, it was thought notable that law enforcement officials of an…

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