Re: What's his beef?
I suppose there's some amount of risk that the computer will go, "It's him" and the police officer will have a quick look and agree and then go and bother that person, whereas in the past they may have put more thought into whether the picture really matched. In other words, the computer identification may be treated as more reliable than it ought to, just on the grounds of it coming from a computer.
It's a bit of a stretch, though. I'd have thought that the advantage of a computer being able to present, say, a dozen potential matches quickly and let the police officer review those would be a good thing.