This is rather GRAPHIC. SCROLL , if you don't want to read this:
If the victim was killed rather quickly, say after first couple of blows to the head, there would not be that much blood splatter or castoff. They may have used a cloth covering up the target during that action. They may have then taken a break, one may have taken off his clothes and finished bludgeoning her, while she was laying (dead) on the floor. The spatter and castoff would be low due to the position of the victim and possibly due to less pressure inside the victim's body.
The blood stains on the surrounding kitchen appliances, cabinets etc.. were indeed located in a low height according to the photographs and the detailed investigative report of the newest document dump.
-Nin