Police have been checking him out, but as of earlier today have not arrested him nor charged him with anything. It is plausible that a cabbie would frequent the same few high-fare, big-tip downtown areas day in and day out, year in and year out, scanning for likely fares in the same few places -- the big hotels, the train station. I don't find it unusual that he recognized the same guy twice.
Scott has been a cabbie for 30 years....