How closely does the movie/book follow the details of the original legend?
Again, those who have both seen the movie and have knowledge about the legend say that the legend has been drastically altered. The movie added the explanation that the spirit entity was a poltergeist created by Betsy herself. It explains Betsy’s poltergeist as due to repressed memories of her father molesting her, and it makes the final scenes look like Betsy and Lucy were in collusion with the poisoning of John Sr. In short, this movie is one of many theories about what really happened to the Bell family back in 1817.