This statement http://en.wikipedia.org/w/index.php?title=List_of_Death_Note_characters&diff;=prev&oldid;=326779992 is indeed original research analysis. Saying that Raye's death "represents a turning point in Light's moral development" and the explanation "With the murder of Raye Pember Light loses both much of his ethics and probably much of the reader's sympathy" is original research. Now, if a published source said that, cite the published source and say the published source says.