The reader can interpret the narrative as either a simple detective thriller, a horror story about a doctor with mixed personalities, or a gothic narrative; in this Dr Jekyll is a representative of Victorian London and the society, the rich and the poor, good and bad, and duality. The narrator of the story is Utterson, he is also the main character and he creates a third person perspective. However, there are many more people that have their say and that contribute to the story, as well as documents and statements for the reader to take into consideration; such as witness accounts, wills and instructions. By making the reader analyse these key features Stevenson is trying to get the reader more involved in the text; also, the style of writing gives the impression that you are in a court case with several sides to the story coming from many different peoples perspectives.
This sense of a courtroom is strongly supported by the fact that there are several people giving their side to the story. Stevenson uses Utterson as the narrator as it is a key aspect of how a Victorian reader would have understood the novel.