Ok.. When APD figured out who he was, they were already aware this guy was a nut-job, but probably not likely to try anything. He made no move toward the weapon and with cops with drawn weapons, they were in no danger, but it could have gone hinky. So the guy had only committed a misdemeanor up to that point. They had probably already got a warrant to put a tracking device on his car and just let him go until later. It would be easy to put a tail on him. They could have gone Cleveland or Oklahoma on him, but didn't. Good for APD.