In the May/June, 2019 issue of Mother Jones magazine there is an article entitled, "What's the best way to change an abuser?"
There is no one best way.
My clinical experience of over 50 years has taught me that the first step is a mental health evaluation to understand the person's psycho-social functioning which is composed of thoughts, feelings and behavior. The causes of domestic violence are multi fasceted.
The Mother Jones article notes that 86% of mass shooters studied had a history of perpetrating domestic abuse.
One program that seems to help somewhat is Men Creating Peace in California. In Rochester, NY, a Social Work colleague of mine had pioneered a program for men who perpetrated domestic violence back in the 70s and 80s. I am not sure if the program any longer exists.
For services in Rochester, NY regarding domestic violence contact Willow Domestic Violence Center.