Do you notice other places where that's happening in the book? What theories do you have about the killer?

There's only one incident that comes to mind when thinking about Blore's theory of Owen murdering by proxy. That is in chapter 3 pg. 51-56. Anthony Marston starts off asking who turned on the gramophone either because of whoever in doing that made one of them (Mrs. Rogers) faint, it could prompt some truthful facts about the message other than who turned it on such as someone playing it as a joke, or because it could tell who's intentionally meaning to start something that's bigger than a joke. Before reading past where the class is suppose to be around/near or up to, I had a feeling that it was somebody and then I thought I was wrong when something drastic happen. Drastic in the sense of surprising if I took the place of one of the characters who witnessed what I consider to have been a drastic occurrence.