THE LAST FEW YEARS at Fall Foliage Festival, Therese and I have opened Hill Crest for people from other towns to tour. It is totally different from The Citadelle, and people enjoy the house and our backyard. We have a problem, though. The problem is that about a block down the street, there are very weird signs saying, “There is a killer among us.” Visitors want us to explain what is going on…