SAN DIEGO (AP) — A San Diego judge has tentatively denied a technology entrepreneur’s request for license plate data collected on his vehicle from police scanners.

The judge ruled Thursday that San Diego’s regional planning agency can deny Michael Robertson’s request under California’s open records law. She says the records are exempt from disclosure because they pertain to law enforcement investigations.

The libertarian founder of MP3.com sued the San Diego Association of Governments last year, saying the scanners are ripe for government abuse. The San Diego Police Department, San Diego County Sheriff’s Department and eight other local police departments deploy cameras and feed scans into a system that keeps the records for up to two years.

Superior Court Judge Katherine Bacal will hear arguments Friday before the ruling becomes final.