Martin Kaste is a correspondent on NPR's National Desk. He covers law enforcement and privacy. He has been focused on police and use of force since before the 2014 protests in Ferguson, and that coverage led to the creation of NPR's Criminal Justice Collaborative.
The federal government has added hundreds of thousands of immigration arrest warrants to a national database used by local police, meaning cops are more likely to know if someone is wanted by ICE.
Federal agents have been filmed wearing masks while making arrests in public. When is it legal for police and the public to conceal their faces in an age of digital facial recognition and doxxing?
Some local police are eagerly signing up to help ICE, but others are shying away, worried about the legal risks. NPR compares two neighboring counties on New York's Long Island.