I've been attempting to come up with an idea for a fantasy/murder mystery/mystery thriller/psychological thriller novel that's a "spinoff", so to speak, of a planned fantasy/mystery/psychological thriller/action-adventure novel series I have. Even though it takes place in an isolated environment, with some scenarios being loosely inspired by Agatha Christie's "And Then There Were None", the novel intends to fill up a few "missing" plot points and tie up some loose ends concerning the events that took place between two time periods other novels in the series took place in (the series intends to use the effects history can have on later dates and the potential corruption of history as a means of world building, emphasizing this with the contrast between what facts the reader knows happened and the potentially corrupted facts presented to the inhabitants, with one or a few books taking place in one time period, and others in another, with overarching mysteries and novels carrying over and readers knowing more than the characters acting as a means of foreshadowing). I do have a motive of murder for a singular character. While its still, heavily, a rough draft, the basic premise is that the host of the event has a chamber filled with every potential record of the "visitors" at his "humble abode," including facts not legally known by a single other human being -- their deepest, darkest possible secrets. However, in turn, I wanted the real murder to become a victim -- a red herring of sorts -- to somebody influenced by the same motivation. However, I find it uncanny and unbelievable that two people stumbled upon the same records and were both likewise led to commit murder of it. I am having issues thinking of how to, however, make it so another character intended for them to commit murder, or led them to with this as blackmail, or really much context of the murders, this motivation or any of the important details.