Who thinks AG died soon after being kidnapped, the murder(s) went on a out their way, and these ransom notes are just a sophisticated way to scam the family?
SG's, "We understand" could be in response to the writer saying. "You think I'm joking. I'm going to do x, y, z to you mom if you don't pay up". MOO
Many pages back. IIRC, it was mentioned it's the 30th anniversary of the movie and that Cameron was wearing a shirt with the same pattern as an actress in the movie. Some speculated the FBI might have suggested the line.