The fact that license-plate scanners are not just installed on police cars, but are collecting data along roadsides across the United States may be shocking news to some, but the real bombshell, according to civil libertarians, is how the collected data is being shared.

Police departments in eight Connecticut locations have been identified as sharing motorists’ location information to U.S. Immigration and Customs Enforcement, leading the American Civil Liberties Union of Connecticut to call for an immediate stop to the activity.