I don't understand the issue with facial recognition if it is only used as a lead, and isn't considered evidence in and of itself, and a person's rights are respected even if they are flagged by the facial recognition software. If the issue is disparate success rates between races or other demographics, then let's just fuzz the incoming data until it's all equal. Facial recognition still sounds like an incredibly use…
This is a bad idea even before we consider that LEO is composed of fallible human beings with an established history of abusing the information systems they already possess.