The Department of Homeland Security plans to build a national database that would gather information from license-plate readers that scan every vehicle crossing their paths, according to a solicitation last week from the agency.
U.S. Immigration and Customs Enforcement would use the technology to help locate and arrest �absconders and criminal aliens,� reducing surveillance hours and enhancing officer safety, according to the request.
DHS spokeswoman Gillian Christensen told Ars Technica that the database �could only be accessed in conjunction with ongoing criminal investigations.�
License-plate readers, which automatically record information on all vehicles that cross their paths instead of just suspect vehicles, are controversial among privacy advocates. The American Civil Liberties Union issued a report last year criticizing the increased use of such devices, saying they collect vast amounts of data on innocent individuals and could be used for abusive tracking and targeting.