Well put. I'm impressed.
I think many of us are overwhelmed by the general idea that law enforcement is abusing the general public out of malice of incompetence, and as a result we become hooked on each one of these incidents as examples of a dangerous slide into a police state.
There's more to the story of law enforcement relating to the public, and it would be good to have or participate in a discourse on some of the root causes and hack out solutions to them.
Trust is a foundation of governance, as you point out. The system, and it's administrators, will work to maintain that trust. In places where the trust breaks down, and I think we have examples of that globally, the populace is subject to great chaos and uncertainty.
I don't think we can have that sort of discourse here, in this forum, and perhaps it's appropriate to have it at a very localized level in a community, but as hackers, geeks, and intelligent people - we can do something about this.