Written by Sean Lyngaas Aug 5, 2020 | CYBERSCOOP In October 2016, during popular protests against the Dakota Access Pipeline, a technologist named Cooper Quintin took a red-eye flight from San Francisco to North Dakota and made his way to the Standing Rock Reservation. There had been reports of police surveillance of the protesters, and Quintin suspected that involved a device known as an IMSI catcher or cell-site simulator.

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