This doesn't seem like a Flock story so much as SDPD making an arrest purely on a nexus to "red Alfa Romeo with tinted windows". From what I understand of the story, the Flock camera did in fact tag a red Alfa Romeo (there's a still frame in the article). It wasn't the right one, but ALPR cameras aren't psychic; they tell you features, make/model, and plate, not "criminal culpability".