Well, of course, my view is biased, but I do believe that the vast amount of officers are good and decent people trying to go about their day the best they can.  With that, though, there simply are too many that do not and even one is too many. 

I think the problem is that there just is not a good environment for the internal exposing of all of these bad actors and too many officers become satisfied with letting some other officer police the way that he or she does (what is really bizarre about this is that in policing there is a common refrain of how usually it is the behavior of another officer that gets other officers in some sort of trouble - collateral damage if you will).

When it comes to policing, I think any honest officer in policing for a lengthy period of time will have witnessed misconduct by another officer or officers.  And the misconduct can be very, very broad and range from the entire spectrum of human behavior (from illegally running a vehicle's license plate for some sort of personal reason to, of course, the worst, unlawfully killing someone). 

To me, the primary reason officers do not come forward on many, many forms of misconduct is because there really isn't an environment to do so and that comes from the top down. The culture just does not allow or promote such an environment - yet.

I also think people have to understand that corruption in policing and the way to deal with it are still relatively new - really, if one thinks deeply about it, anti-corruption in policing in American just started in the 70s.  Yes, that is fifty years ago, but in longer terms, there is still this generational culture bound by norms, mores, and rules of the past.  And here is proof of that rationale - look at how police officers seem to forget and ignore how available video is present today.  I can't tell people how often I have had conversations with other police officers that we simply can't believe working police officers fail to realize they do live in a recorded fishbowl and keep behaving the way they do - my point is that this shows how deep the misbehavior tentacles are burrowed in - that cops KNOW of all this recording technology and somehow keep ignoring it. 

Then there is management.  Management rarely creates a sincere environment that fosters a pure institution and carries on the status quo for their own self-preservation.  For one era, we had a chief of police that went overboard protecting his loyalists.  It was amazing to me how his people walked on water (and this guy bragged about how in his career he had to slap the "bracelets" on officers over misconduct).

And oddly, cops, especially working cops, are sort of bound by the same thing as what Ronald Reagan once said was a Republican commandment: don't speak ill. 

But to me, what I find to be the most alarming thing about all this is the failure of those in policing to rise up and make their own changes instead of burrowing down.  I just don't understand how all of these police executives and those that can make a change, aren't making the changes that need to be made and this includes the police unions as well.  I don't understand why these police unions are not going back to their members and telling them that if they do not make changes, then others will make the changes for them and the changes may not be good.

Hope that answers some of your questions.