Doctors, lawyers, accountants, and even massage therapists run the risk of losing their license if they perform poorly at their job. If we find a crooked Doctor, his license is revoked. When a bad cop is fired, he drives to the next town over and signs up to be a cop. We have a culture of police who are above the law they are hired to serve.
Instituting a national bar association for our police is a move towards unilateral change that is absolutely necessary to show those who we trust with our lives, that they too are to be held accountable for their actions.