In an effort to meet public demand to reduce the size of the brick and mortar prison population, some jurisdictions are doing so but reinvesting manpower and money into what activists call "digital prisons." In addition to electronic monitoring, this increasingly involves surveillance systems that can spy on citizens in real time. One such surveillance program in New Orleans––involving an elaborate network of cameras––has run afoul of privacy and criminal reform advocates. Our guest, Appeal contributor Mike Hayes, discusses the rise of surveillance systems in dozens of American cities.