My confusion is that you think there's a slope here to slip down. As mentioned in another comment, the police really are exceptional in both power and responsib

My confusion is that you think there's a slope here to slip down. As mentioned in another comment, the police really are exceptional in both power and responsibility. As stated in a (far) above comment, this actually is a protection for the officer as well. Remember that they are first responders for evidence, and if they do their job well the video evidence will only bolster their credibility. And if not, it will only empower victims of abuse. None of the other groups have so much responsibility and power where trust is so critical to their functioning. I've is slippery, too, and it can take you in any direction you fall: how far are you willing to compromise a lack of oversight?