Let me add something..........because from what I see here there are a lot of confused and irrelevant thoughts...........so this will add to it.........
The photo that shows SB/C laying with the rifle parallel to her body is very interesting..........
.....blood tracks clearly running around her arms and around her neck..........yet the huge area of blood bteween her right breast and arm has clearly run downwards and it appears that it did this in a considerable gush..
IMO, she was standing during one shot at least, probably both........then while she expired on the floor 'loose' blood continued to run, enough to cause the other tracks.........
Someone laid the gun on her.
Jack