That's in the movies. 
The AI facial recognition nonsense has been systematically removed from a number of software providers like Microsoft and Meta (for Facebook, etC) and has even banned for misuse).
There have been far too many misidentifications, so it's not really "ready for primetime" except for some limited use as a jumping off point.
The massive number of lawsuits (and settlements) against governmental authorities and corresponding LEO for the identification failures, barely "make the news".
The reality is that aside from their calls for tips on their "Capitol Breach" site, they have been utilizing the ground work of the Sedition Hunters, who are basically a crowd-sourced set of investigators who have amassed probably tens of thousands of pics and hours of videos, and combed through them to attempt to get ids and pass that on to the FBI. I'm sure you have seen them posted about before quite a bit on DU!
There is a whole process where once they id someone and find where they are, they have to contact that locale's U.S. Attorney's office (there are 93 of them), get all the affidavits, warrants, etc., together, then once the person is processed, their case gets transfered to the U.S. Attorney for D.C. who will finish them off.
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