Society 'intervenes' by changing the paradigm that in these situations it is the victims fault.  When society reacts as it does to these situations, it becomes difficult at best to report abuse and/or leave the situation because if you do...the current paradigm is to tell the victim it's their fault..."why didn't you leave" etc.  If we change that paradigm, and place the blame where it belongs (on the abuser), then victims will be more comfortable leaving, and coming out and asking for help if/when they need it.  Then society could properly intervene.  

Also I'm not sure that sarcastic, condescending comments (magic abuse locating device) are appropriate in a story about a murder victim.