A device that tricks cellphones into sending it their location information and has been used quietly by police and federal agents for years, requires a search warrant before it is turned on, an appeals court in Washington ruled Thursday. It is the fourth such ruling by either a state appeals court or federal district court, and may end up deciding the issue unless the government takes the case to the U.S. Supreme Court or persuades the city’s highest court to reverse the ruling.
The case against Prince Jones in 2013 involved D.C. police use of a “StingRay” cell-site simulator, which enables law enforcement to pinpoint the location of a cellphone more precisely than a phone company can when triangulating a signal between cell towers or using a phone’s GPS function…
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