Sounds like the guy has issues and it could have gone all "OK Corral" in short order.

I'm going to opine that the on scene officers were well trained in de-escalation strategies and were able to keep the individual from feeling so threaten that he needed to go to guns. 

This time cooler heads and strategic thinking beat hot heads and tactics....way to go APD.
Everybody goes home, and the fella can be (hopefully) dealt with in a safer scenario for everyone.