There's no evidence of NB's blood in the main bedroom or casings his side of the bedroom other than the two attributable to SC. Dr Vanezis states the trajectory of the two facial shots were both 20 degrees below the horizontal. NB was taller than JB and SC.
The trajectory of the shoulder and elbow shots were also both downwards.
My theory is that the perp was in the main bedroom shooting June. As NB approached the main bedroom he was shot twice on the stairs immediately preceding the entrance to the bedroom in the lip and jaw. Casings 3 and 4 are attributable to these shots. The perp was stood at the entrance with the barrel extending onto the landing but the ejection port just inside the door. NB then turned and fled down the stairs with the perp behind him. The perp then shot NB in the shoulder and elbow on the main staircase. Casings 13 and 14 are attributable to these shots. The perp was parallel with the main bedroom door and the ejection port ejected cartridge 13 onto the transition plate of the main bedroom door. The ejection port ejected cartridge 14 to a similar location but it rolled down the stairs and landed a little way down the landing.
Two diagrams which may, or may not, support your understanding
Other docs and SoC photos supporting the above will be posted shortly.
You are just as much of a broken record as Mike. You post the same nonsense in 50 threads.
Each time you post the same nonsense you are going to get the same response.
1) Nevill's shots were to his left profile. Nevill was not facing his killer when shot nor was his back to the killer his left profile was to the killer.
2) One bullet grazed Nevill from left to right across his body. That bullet was found in the master bedroom not the hall or any other room.
3) If the killer were shooting out the door then the casings would have been near the window because the window would be to the right side where the shells were ejected. The fact the shells were ejected onto the bed and near June's side of the bed means the ejection port was where June slept which means the killer was shooting at Nevill's side of the bed.
Your half baked ideas fell apart long ago. You can keep spouting them all you like but they are total nonsense thus you will not find a single expert to support such. You made it up yourself without any expertise at all and with a total disregard for the evidence.