These people are accountable to whom? Themselves and no one else.Sheriff, Police, Prosecutors, Judges, politicians - they effectively form a distinct class that is separate from the general citizenry.
That is the problem, the only eventual authority of resort is diffuse: a difficult to coalesce public opinion that barely motivates a supine citizenry.
That is exactly why Franklin said, "A republic, if you can keep it."
This part of the post really evoked Castigo Cay's America for me.