Well...
take a good look at the crime scene photographs, I am not talking about the smearing, I am talking about the two runs of blood that can be seen in one of these photographs which is situated on the inside of the forearm, and what I want to know, is why these two runs of blood have not been duplicated on the nightdress? It's not too difficult to see, or understand, and it must be obvious to anybody with even half a brain, that these two runs of blood were dry before Sheila's right arm and hand, were positioned on the rifle, otherwise, if the blood had been wet by that stage it would surely have transferred onto the nightdress, and show up on the nightdress once the police moved her right arm and hand...