So, here I am, several weeks on with no definitive answers to my questions. I have, however, whittled the possibilities down in my mind.
A. The filmmaker came up with as clever a plan for marketing a horror film as I’ve seen since The Blair Witch Project way back in the 1990s. He filled his film with just the right kind of information to draw the viewer in and foster belief in his audience. In which case, I say “Bravo, a job well done!”
B. The filmmaker actually made a documentary and in the rarest of cases caught actual evidence on camera. For whatever reasons, to protect his own identity or the descendants of those mentioned in the film, he decided to change the names and locations of the home and its sordid history.
At this time I personally lean toward my first explanation. As I said in the beginning, I am a paranormal investigator and have spent a large part of my life pursuing those mysteries. In other words to embrace the cliche, I WANT TO BELIEVE!