The Chinese solved this by adding more cameras. If you can lookup where the potential suspect came from and pull their full details from the fuzzy query false positives become unlikely. More data is the answer! lol
It's very important to ponder what the PRC is pioneering today because we're about three years behind doing exactly the same things, and for the same reasons. It's only going to be a brief time before things we're horrified about, and vitriolically condemn totalitarian states for, are things we're going to fully normalize within our own culture.
Or just implant RFID into every citizen at birth. It's for your safety, after all - if you get lost or abducted, that's how they'll find you.