The former CNN anchor has said he was not demonstrating, but reporting as a journalist, during the interruption of a service inside a St. Paul church earlier this month.
They rounded up the people who were there and had dark skin, leaving people with lighter skin free.
Agents use facial recognition, social media monitoring and other tech tools not only to identify undocumented immigrants but also to track protesters, current and former officials said.
The key thing is that knowing who the 30 people recording ICE in public are doesn't do much for them in an environment where a couple blocks away, they would get a different 30 people doing the same.