What would you do if someone you loved was being emotionally abused along with their children by their spouse but refuses to leave?

I know a couple that the husband is a complete tyrant. The police have even been called (by the kids, no less) but nothing comes of it. The community "offers support" as a "family" but in reality we've seen this all before. What has to happen is the the woman needs support, there needs to be a restraining order, and guys need to ostracize the husband instead of "helping him cope better". He's had his chances and needs jail.