Even if GBC did not do this... I would still find the way he and his family have acted as being very strange. I mean, this is their wife/daughter in law, mother of kids/grandkids and there has been NOTHING!! Even just his family, apart from his sister saying a few things, where were the BC's crying at the loss of the mother of their grandchildren, their son's wife?? It comes across as though they are totally uncaring about the whole thing. Like it's just one big inconvenience to them. What the heck?
If this happened to one of my son/daughter in laws, I'd be both upset for my child loosing their partner & grandkids loosing their mum, and also upset that I'd lost the in law.
It seems they have no feelings. I know some won't agree, but this is my opinion. Where are their tears? Can't they at least cry over the fact those girls have no mother now, regardless of who killed her? All IMO. I'd show more emotion than they have if I saw a dog get run over.