I actually have a SWAT type team in my world.
They are four member squads of various levels to take care of the different threats (like crazy PC's).
There is the Sniper (Rogue) who can sneak attack from 60 ft away and has a homebrew ring of Dimension Door.
There is the Muscle (Fighter) who specializes in Sunder and Bull Rush. And just for fun carries a Large Greatclub thanks to Monkey Grip.
There is the Negotiator (Cleric) who specializes in Cha based checks.
And there is the Recon Man (Wizard) who uses lots of Divination magic to find the perp and then helps subdue the guy using a Sudden Maximized, Sudden Widened, Sudden Subdual Fireball.
Mind you, thats just the basics for the sixth level group. The higher level they go (10th, 15th, and 20th) the more goodies they have and the more specialized they can become. Needless to say, evil characters no longer can kill large amount of cities while only fighting the town guard.