SD: GPS required warrant under Jones

Placing a GPS on defendant’s car to track him for 26 days violated defendant’s reasonable expectation of privacy and required a search warrant under Jones and relying on its lower court decision in Maynard. State v. Zahn, 2012 SD 19, 812 N.W.2d 490 (2012):

[*P22] In this case, the State argues that Zahn could not have had a subjective expectation of privacy in his movements because he voluntarily exposed his movements to the public. We disagree. While a reasonable person understands that his movements on a single journey are conveyed to the public, he expects that those individual movements will remain “disconnected and anonymous.” Maynard, 615 F.3d at 563 (citation omitted). Indeed, the likelihood that another person would observe the whole of Zahn’s movements for nearly a month “is not just remote, it is essentially nil.” Id. at 560. The prolonged use of a GPS device in this case enabled officers to determine Zahn’s speed, time, direction, and geographic location within five to ten feet at any time. It also enabled officers to use the sum of the recorded information to discover patterns in the whole of Zahn’s movements for twenty-six days. The prolonged GPS surveillance of Zahn’s vehicle revealed more than just the movements of the vehicle on public roads; it revealed an intimate picture of Zahn’s life and habits. We thus believe that Zahn had a subjective expectation of privacy in the whole of his movements. This subjective expectation of privacy was not defeated because Zahn’s individual movements were exposed to the public.

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[*P31] We thus hold that the attachment and use of a GPS device to monitor an individual’s activities over an extended period of time requires a search warrant. Because the unfettered use of surveillance technology could fundamentally alter the relationship between our government and its citizens, we require oversight by a neutral magistrate. Wright, 2010 S.D. 91, ¶ 9, 791 N.W.2d at 794 (quoting Thunder, 2010 S.D. 3, ¶ 13, 777 N.W.2d at 378). Thus, the warrantless attachment and use of the GPS device to monitor Zahn’s activities for nearly a month was unlawful, and the evidence obtained through the use of the GPS device should be suppressed.

[*P32] By our holding today, we do not deny police the ability to use this valuable law enforcement tool. We recognize that police must be allowed to use developing technology in the “often competitive enterprise of ferreting out crime.” Sweedland, 2006 S.D. 77, ¶ 22, 721 N.W.2d at 415 (quoting Illinois v. Gates, 462 U.S. 213, 240, 103 S. Ct. 2317, 2333, 76 L. Ed. 2d 527 (1983)). The Fourth Amendment “cannot sensibly be read to mean that police [should] be no more efficient in the twenty-first century than they were in the eighteenth” century. United States v. Garcia, 474 F.3d 994, 998 (7th Cir. 2007), cert. denied, 552 U.S. 883 (2007). But police must obtain a warrant before they attach and use a GPS device to monitor an individual’s activities over an extended period of time.