WASHINGTON — Federal agent Frank Hunter grabbed a cup of coffee, sat down at his kitchen table and fired up his laptop computer to begin his daily hunt for modern-day war criminals.

It didn’t take him long to come across a propaganda video posted by Islamic State. Hunter watched the slick 36-minute production on YouTube, grimacing at each execution and suicide bombing. Then he methodically captured photographs of the fighters, to be uploaded into facial-recognition databases that he hopes will stop the terrorists from ever coming to the U.S.

Hunter, a U.S. Immigration and Customs Enforcement agent, is a key player in a little-known government effort to keep war criminals and human rights violators — including those fighting in Syria or Iraq — out of this country.

To read the full story click here.