New Ransom Note in Guthrie Abduction

ABC News Crime and Terrorism Analyst Brad Garrett talks about how the second ransom note from the supposed abductors of Nancy Guthrie in February appears to reveal that she had died shortly after the abduction but also indicated the death was unintentional. Then there is a statement about how she was "buried with nature". Most puzzling: the second note apparently contained no further financial demands or instructions about returning Nancy's remains. Why did the abductors send a note discussing her death and presumed burial, but no further demands found?