I can appreciate what you are saying about forensic evidence; however, I was staggered to hear at lunchtime on the News that they were just about to move the bodies. I am amazed that the bodies were left in situ for twenty four hours! I don't really know much about these things, but I would have thought they would have needed to refrigerate the bodies before now, as they would have started to deteriorate which would make post mortems more difficult.
It seems to be an execution style murder from what facts I have heard. That poor little girl, though, I can't imagine how traumatised she must be.