To me the marks look like burns and I was fairly convinced by a YouTube video of testing ballistics on a pigskin to show they were the heated barrel of a gun without a moderator.
I wondered what you all thought of the possibility that the reason NB telephone Jeremy and not the police could be because he was doing so at gunpoint?
Having read up a little on people who commit Familicide it seems a frequent trait is for the perpetrator to even lie in wait for, lure or collect extra members of the family so they can kill them all.
http://hunteremkay.com/2012/04/f-is-for-family-annihilator-killer/Here is one from last May: the killer went to another house and collected his niece, took her back to the house where unbeknownst to her he had killed the rest of the family, and shot her as well as himself. Apparently guns are used in something like 95% of familcides because it's possible to kill so many people quickly. Certainly it was a weekly occurance in the news when I lived in Joburg - they would often kill in laws and relatives who turned up and perhaps the first cop who arrived, but the domestic staff always seemed to escape without injury.
http://www.dailymail.co.uk/news/article-3079255/Five-people-shot-dead-Arizona-home-quadruple-murder-suicide.htmlthis might explain the burns, the reason he called his son, the call ending abruptly and may add up with the theory that SC shot herself several hours later - perhaps she was lying in wait for him in the kitchen and when she realised JB was not alone but with police, she prepared herself for suicide by going upstairs and reading a passage from the Bible, then shot herself when she heard them battering the door with a sledgehammer - the noise of which would have covered the sound of the gun. It seems to me that the blood spatters on her night dress and what we now know about the first wound, she is most likely to have received both wounds close together so perhaps shot herself ineptly, pulled her hand up to her throat (the first wound seems to have spatter around it which suggests she was exhaling through it) then realising it hadn't worked, automatically shot herself again with success. I don't see why JB would have shot her twice: all he had to do was either wait or gently pinched her nostrils closed.
So: burns because called JB at gunpoint, anyone?