The main purpose of a shooting reconstruction is to determine perp/victim location.
In this case the prosecution alleged at trial that JB entered his parents bedroom under stealth and opened fire on NB and June in bed. The defence offered no alternative scenario.
The pathological evidence and casings show NB sustained 4 gsw's upstairs 2 of which were fired within inches of his face rendering him incapable of purposeful speech thereafter. In which case how could he have made the call to JB? And given NB's injuries to his face caused heavy loss of blood externally and internally why wasn't the handset/mouthpiece bloodstained?
What a reconstruction will do, based on all the physical evidence: blood stains to the floor and lack of, casings, distance of shots, trajectories and wound tracks, is show where in the farmhouse NB was positioned when he sustained the facial wounds and where the perp was positioned when he/she inflicted them.
To date there's no expert evidence available in this regard just the prosecution alleging what I've stated above.
I believe, based on the physical evidence, a professional reconstruction will show that when NB sustained the facial wounds he wasn't lying in bed but standing on the landing stairs which immediately precede the entrance to the bedroom. And the perp was standing just inside the bedroom firing out onto the landing. If I'm proved right then this puts a complete different complexion on this aspect of the case as it lends support to JB's claim of a tel call from NB in that it could be argued if NB was on the landing he had come up the main staircase from the kitchen having just called JB.
They established all this 35 years ago, Holly!
Nevill wasn’t shot in the bedroom (none of his bloodstains were there) — he was shot on the landing. Surely you know that? Surely you know police & forensics PROVED that by the casings and Nevill’s blood on the landing?
It’s blatantly obvious that the perp, Jeremy Bamber, quietly crept into the bedroom whilst June & Nevill were sleeping, and the bullets hit June first. Simple as that. Nevill obviously jumped up out of bed, struggled with Jeremy by the bedroom door and onto the landing — that’s where June comes in again — she raced to the door to try and help Nevill, hence her bloodstains on the carpet, Jeremy punched her in the face blackening her eye, she ran back a bit in all the panic and mayhem, then Jeremy shot her between her eyes. DEAD.
Nevill was then shot with the last of the bullets Jeremy had loaded in the rifle; Nevill would’ve known the rifle was now empty & raced downstairs to raise the alarm by calling 999 & possibly arming himself. You know the rest...Jeremy finished Nevill off in the kitchen.