You know, in the old days a local sheriff finding himself in such a situation would have sent everyone home and just posted two deputies to make themselves comfortable on a couple of lawn chairs with a thermos of coffee and wait the guy out.  No mega SWAT vehicles, no gas, no shooting, no worried neighbors, no loud speakers and most of all no one would end up dead as is very likely how this case is going to turn out now as the police seem to feel the need to escalate the situation rather than out smart the fellow.  Just back-off some and give the fellow a little time to think that no matter what, being alive is nice.