It could be real, it looks like they rolled her over and then covered her up with the sheet. Rigamortisis (sp) had probally at least partly set in so that explains the akward positioning. The left side of her face is consistant with the blood colagulating (sp) like seen on her autopsy photo but it would be worse before inbalming. I've see a "found body and know it isn't pretty, often blood leaks from the nose and mouth. It kind of looks like they might have covered her face with her hair to try to make it look less greusome.
I don't know, but this makes sense at least to me.