The latest technologies promise cops the ability to whip out a smartphone, take a snapshot of a passerby, and instantly learn if that person is in an immigration or gang database.

A federal broadband program, designed after 9/11 to improve first responder communication during emergencies, will enhance this sort of capability and integrate it into an internet "super highway" built specifically for police and public safety. The program, called FirstNet, is already expanding the surveillance options available to law enforcement agencies across the country.

According to publicly available documents, as well as interviews with program participants, stakeholders, and government researchers, FirstNet will help agencies like U.S. Customs and Border Protection communicate with local police, deliver more information to officers' hands, accelerate the nascent law enforcement app industry, and provide public safety agencies with new privileges and powers over AT&T's commercial broadband network.