But what would have happened had there been no body cam footage. The police officer likely would have made up whatever story he needed to justify the arrest (remember, they're expert at that), and nurse Wubbels would have been charged instead of released.
I think it is very helpful to have an adversarial judicial system, but sometimes it swings too far in one direction. In the case of the police, they know that in 99% of cases they can say whatever they want and it will be taken as the truth. It has led to systemic abuse.
So then get rid of a police force altogether and see how well that works out for society. Crime increase by 500% overnight. If, as you are suggesting, the actual problem is police officers then it stands to reason that a police force is unnecessary in your estimation.
The bobbies in the UK don't have guns and their crime rate is lower than in the US. I highly, highly doubt that any criminal even considers armed police vs. unarmed police as a consideration in their criminal activities.