I believe they do, they are not just arbitrarily pulling folks off the street, or, as I'm sure someone has suggested, doing so based purely on (racial) appearance. We have illegal immigrants from 190 different countries, just that right now, the worst of the worst, mostly Latino gang members, have been getting all of the attention.
But as these are not legal American citizens, they are not entitled to individual protracted hearings based on prosecution and defense; once found guilty of a crime gang and non-citizenship (and a crime essentially voids VISAS, prior agreements and green cards), your case is pretty much finished.
We have literally millions of people to contend with thanks to JOE BIDEN and we have neither the courtrooms nor the facilities to house them all and feed and take care of them while we wait years for each trial to play out.
Got a problem? Take it up with Joe Bedpan, he created the crisis. Let them prove their innocence elsewhere on their own dime--- our government's first and foremost duty is to make America safe again.