Via The New York Times:
A federal judge in Manhattan ruled on Tuesday that drugs seized from a man charged in a narcotics case could not be used as evidence, because agents had not obtained a warrant for a covert cellphone tracking device that led them to his Washington Heights apartment, where the drugs were found.
The portable device, known as a cell-site simulator and often referred to as a Stingray, has been used widely by federal and local law enforcement officials around the country, including in New York, to solve crimes and locate missing people.
Last September, just weeks after the search in the Manhattan case, the Justice Department announced a new policy that requires federal law enforcement officials to obtain a search warrant in most cases before using a cell-site simulator.
The simulator essentially mimics a cellphone tower (or cell site), and tricks cellphones into transmitting “pings” to the device, allowing agents who have narrowed down a targeted phone’s location to determine where it is in use.
But the judge, William H. Pauley III of Federal District Court, ruled that the simulator’s use constituted a Fourth Amendment search. “Absent a search warrant,” he wrote, “the government may not turn a citizen’s cellphone into a tracking device.”
Nathan Freed Wessler, a staff lawyer with the Speech, Privacy and Technology Project, which is run by the American Civil Liberties Union, said the ruling was the first by a federal judge to suppress evidence obtained through the warrantless use of a cell-site simulator. In March, a Maryland appellate court affirmed a similar decision by a circuit court judge in Baltimore.