Nobody exercises perfect judgment all the time. Who among us could stand to be videoed in everything we do on the job? Not me.
I think I could. Certainly I'm not saying I'm perfect and mistake free. But I've had some rather high visibility lines of employment, often times being recorded by security cameras, which I suppose describes a large number of jobs these days.
Police are often expected to record themselves, and it is then supposed to be the right of the public to demand copies of their videos. The corruption comes in when they either fail to run or fail to provide these videos. I have found this type of corruption to be the rule, not the exception, in my locality.
I understand that police have a high stress, high speed job where mistakes can be made in a heartbeat. All that is expected of them is a high degree of skill, combined with an honest effort to do their best, and always be truthful, even when that means admitting to mistakes which happened in the course of an honest effort to do their best, because everyone makes varying degrees of mistakes throughout their entire lifetimes. If a cop can't handle publicly doing that to the extent of videotaping his or her every on the clock action they take, he or she shouldn't be a cop.