Faulkner's use of authorial intervention can be found wherever he uses the pronouns "we" or "our." The author uses the plural to indicite the pridefulness of both the town and the South. Here are a few of the instances where this usage occurs and the purposes:
1) Part one: "...our whole town went to her funeral." Establishes the town as an organic whole. Emily was a part of this town, an "traditon, a duty, and a care; a sort of hereditary obligation." The new generation, however, ignores their duty to the past.
2) Part Two: "We did not say she was crazy then. We believed she had to do that." This is another sort of neglicence. Despite repeated signs that Emily was losing it, it is easier to ignore/dismiss our fellowman's needs than it is to address them.
3) Part Three: "So the next day we all said, "She will kill herself"; and we said it would be the best thing." Similiar reasoning as Part II, but this is even more of a grim comment on humanity; our love of spectacle, and of seeing someone once perceived as "better", fall.