In his forthcoming book, Your Data Will Be Used Against You, George Washington University Law School professor Andrew Guthrie Ferguson explores how the rise of sensor-driven technologies, social media monitoring, and artificial intelligence can be weaponized against democratic values and personal freedoms. Smart cars, smart homes, smart watches—these devices track our most private activities, and that data can be accessed by police and prosecutors looking for incriminating clues. What should legislatures, courts, and individuals do to protect civil liberties?