Tizzy, thanks for sharing.
It's funny you say about your husband not caring... We ask my sons specialists about this and he says it is a coping mechanism for him. It makes sense. Our son says he doesn't like being the way he is and he "promises to be good" so when he lashes out or gets in trouble he tells us he doesn't care. Apparently it makes it a bit more acceptable in his mind if he "doesn't care" so that he doesn't have to face the facts and implications of his actions. IYKWIM.