In this photo attached, notice how all the metallic materials are gleaming. The rifle barrel, Sheila's neckless and ring. Yet the area of the alleged earring.... Nothing!
You’re correct David, but as Snow pointed out the rifle itself has moved considerably here, the end of the barrel is well beyond the necklace where as in other photos it was only at the necklace level, so the two photos can’t be directly compared as if they are both genuine then the body has been tampered with.
I agree that in the photo you have shown the pendent doesn’t appear to exist - however neither does the “mark” that can be seen in the other pictures if it’s not a pendant, which does suggest something has either been moved/dropped/lost or blood has now covered that area if it was only an unmarked patch, which would raise its own complications at that stage!