April 10, 2015 "ICH" -  It's déjà vu. And it's also a nightmare.

Police gunning down unarmed black men and boys is an American horror film that keeps getting replayed. Except that it isn't a movie you can turn off: It's a painful, outrageous, and unacceptable reality.

The latest iteration is the shooting of Walter Scott -- pulled over for a traffic violation, and who allegedly owed child support -- by a South Carolina police officer. As Scott ran away from the officer, four bullets slammed into his back and one hit his ear. After the shooting, the officer walked calmly over to Mr. Scott's body, lying in the grass -- and then, for good measure, handcuffed him.

Why was Walter Scott killed? Why does this keep happening?

Did we not just see a South Carolina police officer shoot Levar Jones for trying to retrieve his driver's license at the officer's request at a gas station? Did we not just watch Eric Garner, an unarmed man, choked to death in Staten Island while being arrested for selling cigarettes on the street? Are we not still grappling with 12-year-oldTamir Rice being shot and killed in a Cleveland park while playing with a toy gun within seconds of police arriving? Did we not just recoil from images of Michael Brown's lifeless body left unattended in the street for hours?

Have we not recently heard the testimony of Milton Hall's mother recalling how her son's life ended in a barrage of 45 bullets in Saginaw, Michigan? What about thekilling of Dontre Hamilton in Milwaukee, shot 14 times after an altercation with the police because he was sleeping in a park? Or John Crawford in a Walmart near Dayton, Ohio, gunned down for picking up a BB gun in the sporting goods section?

The list is long, and yet there are hundreds more that haven't gone viral online or been caught on video.

The tsunami of incidents of police brutality against communities of color has further frayed America's trust and confidence in police departments to achieve their singular function in our society: to serve and to protect our families and communities. The slaying of Walter Scott shows that all too often the police perform the opposite function, by terrorizing and profiling people of color.

And for what?

Steps to halt this parade of horrors have been taken, but we're not there yet. We have a long way to go. Recommendations put forth by the President's Task Force for 21st Century Policing, DOJ's announcement of resources for pilot sites in six cities aimed at strengthening the bonds between police and citizens, reports of and recommendations to end jaw-dropping racial profiling and selective enforcement of low-level offenses in communities of color -- all of these are important efforts. Yet the number of tragic and avoidable killings of people of color continues to mount.

In addition to the steps above, police departments need to shed their abusive and profiling pasts and recommit themselves to the communities they are responsible for serving. This promise must be grounded in the principle of dignity and respect for the community. Police must see their departments and officers as part of the fabric of the community. Police departments need to reconsider their enforcement priorities and to start treating arrests as rare commodities to be used sparingly.

Our country's addiction to arrests and incarceration has created fear in poorer communities of being arrested for minor, nonviolent offenses, prompting interactions with police that we have seen time and again escalate quickly into unnecessary tragedies. A moment of conjecture: If Walter Scott does not fear that a routine traffic stop or owing money is going to lead to his arrest and possible imprisonment, does he flee from the officer? Is he alive today?

Police need robust training for police officers on de-escalation techniques, relegating force to a last resort. Force should be understood on a continuum that allows for only the minimum force necessary in any given situation. Police need to ban racial profiling, provide implicit bias trainings, and train officers on how to practice procedural justice. When officers or departments violate policy or break the law, those departments and state officials must hold the responsible parties accountable.

We welcome the swift action in this case by North Charleston -- undoubtedly propelled here only by the existence of a damning video -- in bringing charges against the police officer. Video or no video, prompt investigation and appropriate action following a police shooting -- just as with any possible crime -- should be the rule nationwide, not the exception.

But these incidents are more than just bad-apple cops: The problem of unjustified lethal force is endemic.

Sadly, we only know part of the story because we have no uniform, comprehensive reporting requirements of police shootings. The data just doesn't exist. Indeed, even after the many discussions of police force generated by these incidents in recent months, and notwithstanding the DOJ's documentation of widespread problems around use of force in Cleveland and the use of unreasonable force and racial profilingin Ferguson, we have not been able to reconcile the mandate of fair, constitutional, and humane law enforcement with the current status of American policing.

The unjustified killings of unarmed people of color by police, often arising from racial profiling or enforcement of minor offenses, continue with reckless and tragic abandon. The steps taken by DOJ are very important, but much, much more needs to be done.

Walter Scott should be alive, and at home. Instead, he's dead. His death is not an aberration. It is a direct result of the current state of policing in many parts of America today.