[alistairSH]

Limit qualified immunity and require officers to carry personal liability insurance on the job.

Increase police training requirements. They're woefully undertrained in the US (at least relative to Germany and several other Western European nations).

National LEO registration or something similar to stop the movement of bad officers from one department to another.

[michaelmrose]

You are right but its not merely the degree of training but how they are trained as well. As it stands many are trained that every interaction with the populace might get you murdered and you ought to be ready to murder them first.