They are not and also dont do much to protect you. Untouchable cops due to qualified immunity and presumption of reguparity and simple fact that there is no remedy if they break your rights make this entirely moot.

Just now, like today, a decision was made that cops who literally made up a gang to go after innocent people ... wont be investigated.

Pretending you found proofs legally when you did not is easy. Especially when you are untouchable. And the rule does absolutely nothing to protect innocent people. It is just trying to make up for one injustice by creating another smaller one.