Call 1800-799-SAFE They are a national hot line that can refer you to your local states Domestic Abuse Center. Try to get her to call! Please try to get her to one of these SAFE houses .
They help with legal stuff and can provide relocation if needed. If she does not wish to press charges they will STILL HELP HER! They have trained people who can counsel her and provide support she really needs and they have people for the kids too!
This kind of stuff is VERY Mentally damaging for kids! Please note they are very secretive about the location of the places protect people like your sister so please do not be upset if they will not tell you where she is! Also they will provide financial support once you are in the program for a time-( I know someone they gave an apt and a car to start over) they have to screen you but I guarantee they will HELP!
Yes, if there is something currently going on - meaning he is threatening her at that moment. In that case, the cops will intervene. Other than that, the cops can't do anything since there is no evidence of a crime having occurred.
Convince your sister to get a divorce and a restraining order. Or, and this might cause your sister to hate you, you could call child protective services and get them involved. They will interview the kids, and if they say the same things about their father that you are saying, they will be protected away from him.
Your best bet though is to get your sister to realize she is married to an abusive a**hole, get a divorce, and get her into a battered woman's shelter for awhile.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.