Will "Wheaton", starred in "Star Trek, The Next Generation". This show featured many alien characters that killed humans. Bradley "Cooper" starred in "The Midnight Meat Train" which was about a serial killer on a train killing people to feed some alien creatures underground.
Clearly, our clever SK is laying out the tale that he has to kill to feed alien creatures.
Your theory might apply to Area 51 if there were unsolved murders in that area and if one believed in that sort of thing.
Your two comparisons aren't related to each other, whereas all the multiple comparisons I've given are specifically related to James Fenimore Cooper and actual people, occupations, locations, etc. related to the Mary Ann Plett murder. I'm just pointing out the high number of coincidences and not setting my observations in stone. Did the killer plan the murder which reflects those coincidences? Whether consciously or subconsciously, who knows. It's open to speculation. It's also out in the public domain to be seen by someone at a future time who might be able to match the
pieces of the puzzle and make a connection.
A case in point; a witness was told many years ago by
someone known by a person of interest in a cold case serial killing that this
someone had a specifically-named item. All the witness was told at the time by this
someone was they had the item and were holding it as insurance/leverage for an unnamed reason, nothing at all about the murder. Since it didn't make sense to the witness at the time, (who knew nothing of any crime or even about a trophy taken from the scene of a cold case serial killing), the witness dismissed it as "just talk".
It wasn't until years later (and very recently), though, that the witness recounted that confession to a person researching that very crime who was able to put that specific piece of information together with what the researcher already knew about the crime and knew right away the connection of both
pieces of the puzzle and the significance of that information (and its relationship to numerous instances of circumstantial evidence known about that murder) because it not only implicates the person of interest in the murder but also the other person for covering up their knowledge of the crime after the fact. Whether a sworn statement by the witness to these facts is enough to procure a search warrant for that item isn't known.
Too bad that the witness won't come forward. It could possibly solve several other murders.