"#eff Files New Lawsuit Against California Sheriff for Sharing ALPR Data with ICE and CBP"
"The Sheriff uses automated license plate readers (ALPRs)—high-speed cameras mounted on street poles or squad cars—to scan license plates and record the date, time, and location of each scan. This data can paint a detailed picture of the private lives of Marin County residents, including where they live and work, visit friends or drop their children off at school, and when they attend religious services or protests."