(TW- Domestic violence mentioned) What should be done about repeat domestic violence offenders and their victims?

Sky (She/they) 💖 • ❤ Intersectional Feminist ❤ Queer ❤ Genderfluid

So a month or two ago there was a murder in my county and it happened to be a domestic violence issue. The guy has been previously arrested and had just been released for a domestic violence charge involving the woman he killed. The cops had been called several times due to domestic issues. My question is what should we do to keep these things from happening and should the police have done more? Here's an article about it from a local news station