Yes, it really does cover everything you'd want to think about when planning a murder. A murder mystery. I'm not planning a murder. The article, it's a good article.
I very much liked the interactive aspect of this one as well. @Fenwick brought in several people and got their thought processes moving; it's something we're after promoting more, as per the Moonbase interactive serial.
The thing is I see a lot of folks treat a murder or any kind of crime and the focus is always on THE CRIME. When in truth the crime is the easiest thing to write. It is the story around the crime which takes effort.