https://www.techdirt.com/articles/20200108/16040043701/dhs-move-ahead-with-plan-to-harvest-dna-samples-nearly-everyone-detained-ice-cbp.shtml

Looks like everyone roaming across the board is going to become a source of info for the US government. The DHS has already rolled out facial recognition at international airports and additional biometric collections elsewhere. The Fourth Amendment's near-nonexistence at the border has led to a steadily-increasing number of invasive device searches. Visa applicants and other long-term visitors are being forced to turn over social media information (including passwords) during the application process.

Now, the DHS is hoping to collect DNA from nearly every immigrant it has in custody. The DHS first pitched this idea back in October, hoping to strike the lone exemption keeping it from collecting samples from the hundreds of thousands of people crossing southern borders every year.