Describe Holcomb. In what ways is it an ordinary town? In what ways is it different? Why does the author spend so much time describing the town?

This is only a short answer space but I can make a general comment. Capote describes the agricultural town as a sleepy close-knit community. They go to church and they are relatively free of crime. The neighbors trust each other’s and doors often remain unlocked at night. This sense of assurance, calm, and trust makes Holcomb attractive for criminals. Nobody expects crime, especially a crime of such severity. Dick and Perry don't even have to break into the Clutter house: the door is unlocked.