Sampling of local law enforcement license plate reader use The Santa Rosa Police Department operates 129 Flock cameras with four more awaiting installation. The Petaluma Police Department operates 4 Flock cameras. The Rohnert Park Police Department operates 30 cameras. The Lakeport Police Department operates nine Flock cameras for a total contract of $21,250 annually. Flock data was also used to recover the submerged car of missing Rohnert Park man Kale Gonick Hallows, who was found dead in mid-January following a 10-day search, Mattos said.