I've really wracked my brains on this one and I just don't think the autopsies could show whether the girls were killed a long time before Shan'ann. Unless they had birthday cake in their stomachs and it could be shown that they ate it at the party. I think that is quite unlikely. If they'd been sedated that might show up in their livers, and I suppose they could say there was no time for this in the timeline of Shan'ann's arrival home and her own death. Although in the context of his story of her attacking the girls that certainly wasn't a possibility.
In terms of proving it was him there could be internal bruising in the girls' necks larger than Shan'ann's finger length. Or no neck damage, and a totally different cause of death for the girls like poisoning for instance, with CW hoping the oil would accelerate decomposition but being wrong about that.
Just a few ideas.
In terms of proving it was him there could be internal bruising in the girls' necks larger than Shan'ann's finger length. Or no neck damage, and a totally different cause of death for the girls like poisoning for instance, with CW hoping the oil would accelerate decomposition but being wrong about that.
Just a few ideas.