Responses
Sherlock —> Charlotte
Irene Adler —> Ireneus(?) Adler
John Watson —> John Watson
Mrs. Hudson —> Martha Hudson
The serial killer is most probably based on James Moriarty, so someone with similar name is the true killer I think. Someone with name James or Jim? If woman Jane? Or maybe Mary? Maria also works.
i just realized the names are from Sherlock Holmes
John Watson is her assistant and Adler is her fiancé