Few people would dispute that an armed murder suspect running loose in suburbia is a legitimate reason for a SWAT deployment; after all, "armed, barricaded suspect with hostages" is pretty much the raison d'être for the whole SWAT concept in the first place.
Deploying a perimeter and then assaulting an occupied house, all on the basis of a "He went thattaway!" is a little tenuous.
Not cleaning up your own mess is frickin' inexcusable.
(H/T to Zendo Deb.)