Who are the good cops and where are they?

“The blue wall of silence, also blue code and blue shield, are terms used in the United States to denote the alleged informal code of silence among police officers not to report on a colleague’s errors, misconducts, or crimes, including police brutality.” Wikipedia
“Now is the time to rise from the dark and desolate valley of segregation to the sunlit path of racial justice. Now is the time to lift our nation from the quicksands of racial injustice to the solid rock of brotherhood. Now is the time to make justice a reality for all of God’s children.”
From “I Have A Dream”, MLK
In the wake of each of the numerous instances of police misconduct which resulted in the deaths of unarmed black people, we see and hear the arguments and assertions that the cops who have been ‘caught on tape’ engaging in questionable behavior, which is violative of the reasonable expectations regarding their legal and moral obligation to ‘protect and serve’, as not being representative of the law enforcement profession.
The essence of the assertions and such argumentation is that what we see in the videos is not representative of the “vast majority” of the police officers who “go to work every day and risk their lives for the public good”.
The videos of cops choking and shooting unarmed black people to death are not representative of the ‘good cops’ who outnumber the ‘bad cops’ by an overwhelming margin.
“We are now faced with the fact that tomorrow is today. We are confronted with the fierce urgency of now. In this unfolding conundrum of life and history, there “is” such a thing as being too late. This is no time for apathy or complacency. This is a time for vigorous and positive action.”
—–Martin Luther King Jr.
It doesn’t seem feasible or possible that the “good cops” can go through entire careers and not witness, or be privy to, at least some of the on duty misconduct and misbehavior of colleagues and associates that is in clear violation of police policies, procedures, practices, and protocols.
Silence in the face of injustice is complicity in the perpetuation and perpetration of injustice…
“When you see something that is not right, not fair, not just, you have to speak up. You have to say something; you have to do something.”
So here’s the question:
In the struggle for reforms in policing and social justice, who are the “good cops” and where are they?