TCF fellow Barton Gellman and policy associate Sam Adler-Bell sat down to discuss a controversial surveillance device known as the “Stingray.” Originally developed for the military and intelligence world, Stingray devices are now used by local police departments across the country to track suspects in routine police work—potentially violating the constitutional rights of thousands of innocent Americans in the process.

To find out more about the extraordinary measures taken by police and the FBI to keep details about Stingray devices secret—from the public and from the courts—check out Adler-Bell’s recent article in US News.