III- answer part 3

Perry’s confession is in some sense the climactic sequence of In Cold Blood, in spite of the fact that it refers to events that have already taken place. All the narrative threads of the book up to this point have anticipated this release of information: it satisfies the KBI investigators’ search for an explanation of what happened on the night of the killings, and in a subtler way, it completes the picture of Dick and Perry that the narrative has so carefully traced throughout the book. Check out the whole analysis in the link below,