The ACLU of Southern California and the Electronic Frontier Foundation sought Automatic License Plate Reader (ALPR) data from the City and County of Los Angeles under the California Public Records Act. The City and County contended that all such data was exempt from disclosure as law enforcement records. The City and County prevailed at the trial and appellate court; ACLU and EFF filed a petition for review with the Supreme Court of California. We argued that the breadth of the law enforcement exemption, as interpreted by the court of appeal, violated the constitutional obligation to construe exemptions from disclosure narrowly. Broad law enforcement exemptions shield too many records from public disclosure, and construing the Public Records Act to exempt these documents would significantly impair the ability of the press to inform the public about law enforcement activity.