Ice accessed car trackers in sanctuary cities that could help in raids, files show

Westchester county has laws limiting cooperation, but Ice has accessed trove of data that holds license plate readers

As Donald Trump's administration ramps up its crackdown on undocumented immigrants to the US, advocates are increasingly worried immigration agents will turn to surveillance technology to round up those targeted for deportation, even in so-called sanctuary cities" that limit the ways local law enforcement can cooperate with immigration officials.

That's because US Customs and Immigration Enforcement (Ice) in past years has gained access to troves of data from sanctuary cities that could aid its raids and enforcement actions. Among that information is data from the vast network of license plate readers active across the US, according to documents obtained by the Guardian.