Conversation so far:
What are some important aspects in the development of Chapter 27?
Chapter 27 is based on Let Me Take You Down: Inside the Mind of Mark David Chapman, a book of Chapman's recollections of his act of violence.
Was there any controversy involving Mark Chapman's unraveling depicted in Chapter 27?
In April 2006, an on-line petition group calling themselves Boycottchapter27.org campaigned to pressurise [sic] movie theatres not to show the film, to stop the glorification of a murderer.“
What else happened during Mark Chapman's incarceration?
Aside from two interviews with Larry King and Barbara Walters, both in 1992, Mark Chapman has not spoken with the media
How well did the interviews go with Mark Chapman and Larry King and Barbara Walters?
Mark Chapman did reveal the mechanics of his unraveling during those three days in New York City to journalist Jack Jones.

Question: Can you tell me if anything else important happened with the development?
Self-contained rewrite: Can you tell me if anything else important happened with the development of Chapter 27 besides portraying the unravelling of Mark Chapman very well?