"San Diego has ended its seven-year experiment with facial recognition"
Yup. Could've told you that. I'm sure someone enriched their pockets by doing it but it's pointless as the false-positives are far too high, and far too important to leave to a computer system alone.
Every trial I've read, the only "arrests" come from random incidental things - i.e. they stopped a guy on a false positive for a mugger, but he just so happened to have some weed on him, so they nicked him. Nothing at all to do with any success of the system.