The Stingray had worked perfectly. Agents traced the suspect’s AirCard back to his apartment and now had more than enough evidence for a conviction. But in the years that followed, that open-and-shut case would turn into something far more complex. Working from prison, Rigmaiden would unravel decades of secrecy, becoming the world’s foremost authority on the device that sent him to jail. By the time he was finished, a covert surveillance device and the system that kept it secret would be exposed to the public for the very first time. —The Dragnet - The Verge