im not sure why they would even bother with the cameras at that point.
Lots of data to feed into their Palantir systems to keep track of l̵a̵w̵f̵u̵l̵ ̵p̵r̵o̵t̵e̵s̵t̵o̵r̵s̵ terrorists.
i didnt think of that, actually, and facial recognition training and such actually sounds like a pretty plausible reason.
(that's why i wrote my opinion on a message board, instead of a letter addressed to the director of ice)