Not to get all philosophical, but where does all the love go? I am also single, no kids, no psychology degree. But you love someone and you love these little people so much and suddenly it's all gone. Who do you love? I see it somewhat as shock and a coping mechanism. If this was an existing issue, ad it seems to have been, he must have been mourning the loss of his partner and the mother of his kids before this horrible thing happened. Perhaps the feelings will change with his grief, there will be anger, rage, maybe hate, but for now I think the only thing this man is holding onto right now is the love.