The details of this episode show the quality of the writers at their best. All the elements are there--suspense, mistrust, anger, pride (Barney of course) humor (Barney again) and above all, Andy's ability to figure it out over the qualified and well-intentioned assigned investigator from the capitol. Barney's flighty personality is perfectly shown when his "nemesis" (the outside investigator called in by the new overly zealous mayor) compliments Barney on his safety slogan, and suddenly he's all in for the outsider.
This is really Andy's moment, as his old school common sense but exceptional mental skills put him on top once again. Although there is no Aunt Bee nor Opie, this episode will live forever in its presentation of mystery, drama and plenty of laughs. Melange, anyone?