I have actual experience of a very similar situation.
My stepfather was very abusive both physically and verbally, often breaking into wild rages. One day we recorded him swearing the worst kinds of words at us, and played it back to the elders thinking surely this would be the time they would do something about it. But no... the elder we took it to erased the tape and told my mother how wrong she was to usurp his headship this way....
It's one of those stories that unless I was there, I wouldnt' believe.
Unsurprisingly, my stepfather left unchecked almost killed my mother with a kitchen knife, at this point the elders advised her she could now leave him because her life was in danger.. It was the neighbours who backed her up in this incidence and called the police, I think the elders were shamed into it.
She thought she was being faithful, and stayed married to him for 10 years while he terrified our whole family because that was what the elders advised her to do, The day they said it was ok for her to leave, she did. I lost a lot of respect for her and even back then realised her feelings for us were second to her obedience to Jehovah.
So.. long story short, I wouldn't trust the elders as far as I could throw the lot of them
Poppy