Texas National Guard, a military force under governor’s command, installed DRT 1301C cellphone spying device (a so-called ‘dirt box’) on surveillance plane (Nov 6) https://t.co/TRzphthodD (note: unlike Stingrays, DRTs can capture content, not just IMSIs)

— Matthijs R. Koot (@mrkoot) November 12, 2017

The ACLU has identified 24 states, including Texas, where cell-site simulators are used by law enforcement.