An anonymous reader quotes a report from SFGate: The American Civil Liberties Union on Wednesday sued U.S. Immigration and Customs Enforcement for records about the agency's use of license plate reader technology, after ICE apparently failed to turn over records following multiple requests. In December, ICE purchased access to two databases of ALPR data, the complaint reads. One of those databases is managed by Vigilant Solutions, which has contracts with more than two dozen Bay Area law enforcement agencies. "We believe the other is managed by Thomson Reuters," ACLU laywer Vasudha Talla said. The ACLU and other privacy advocates have expressed concern about how this data will be stored and used for civil immigration enforcement. The ACLU filed two requests under the Freedom of Information Act in March seeking records from ICE, including contracts, memos, associated communications, training materials and audit logs. Since then, ICE has not provided any records, the ACLU said in the complaint, which was filed Tuesday morning in the Northern District Court for the Northern District of California. "The excessive collection and storing of this data in databases -- which is then pooled and shared nationally -- results in a systemic monitoring that chills the exercise of constitutional rights to free speech and association, as well as essential tasks such as driving to work, picking children up from school, and grocery shopping," the complaint said. "We have essentially two concerns: one that is general to ALPR databases, and one that's specific to this situation with ICE," Talla said. "The ACLU has done a lot of work around surveillance technology and ALPR, and we're generally concerned about the aggregation of all this data about license plates paired with a time and location, stretching back for so many months and years."