it's going to be important though because the DCI spent ages lying on the bed, looking at the blood splatters, thinking about angles etc.
Or at least, that is what I think he was doing
I am not sure he was abusing his daughter but I think she may have thought he might start to. She didn't seem scared of him at all. Perhaps she was protecting her from what would happen in the future?
I think the daughter is a brilliant actress and really glad to see a social worker portrayed in a good light rather than as a jobsworth paper shuffler.