If I understand the question correctly... the use of a first person's narration in a Gothic-esque story can be used to delve into the characters mind, not only giving the reader a more understandable connection to the character, but it is able to bring taboo and otherwise unsaid dark thoughts into play of the scene
Media literacy is the ability to access,analyze, evaluate, and create media in variety of forms.
Answer: Carew's murder gives Mr. Utterson the opportunity to search Mr. Hyde's house and learn more about him.
Mr. Hyde has bumped into a gentleman called Carew. When this man says hello to Mr. Hyde, he beats him to death. The police later finds a letter in the dead body, addressed to Mr. Utterson, and decide to contact him. This gives Mr. Utterson and the police a chance to explore Hyde's living quarters, where they find the murder weapon and Hyde's check book.