(Washington Post) The faces of more than 120 million people are in searchable photo databases that state officials assembled to prevent driver's-license fraud but that increasingly are used by police to identify suspects, accomplices and even innocent bystanders in a wide range of criminal investigations. The facial databases have grown rapidly in recent years and generally operate with few legal safeguards beyond the requirement that searches are conducted for "law enforcement purposes." Amid rising concern about the National Security Agency's high-tech surveillance aimed at foreigners, it is these state-level facial-recognition programs that more typically involve American citizens. The most widely used systems were honed on the battlefields of Afghanistan and Iraq as soldiers sought to identify insurgents. The increasingly widespread deployment of the technology in the United States has helped police find murderers, bank robbers and drug dealers, many of whom leave behind images on surveillance videos or social-media sites that can be compared against official photo databases. But law enforcement use of such facial searches is blurring the traditional boundaries between criminal and non-criminal databases, putting images of people never arrested in what amount to perpetual digital lineups. The most advanced systems allow police to run searches from laptop computers in their patrol cars and offer access to the FBI and other federal authorities. That prospect has sparked fears that the databases authorities are building could someday be used for monitoring political rallies, sporting events or even busy downtown areas. Whatever the security benefits — especially at a time when terrorism remains a serious threat — the mass accumulation of location data on individuals could chill free speech or the right to assemble, civil libertarians say. "As a society, do we want to have total surveillance? Do we want to give the government the ability to identify individuals wherever they are, without any immediate probable cause?" asked Laura Donohue, a Georgetown University law professor who has studied government facial databases. "A police state is exactly what this turns into if everybody who drives has to lodge their information with the police." License image