This is interesting......in all the years of reports of US police violence there's never been a full survey on police killings. Even more confusing, the little data there is conflicts.....mental.
http://www.nytimes.com/2015/10/18/upshot/police-killings-of-blacks-what-the-data-says.html?_r=0
Are Police Bigoted?
"Such arguments suggest that the use of deadly force by police officers unfairly targets blacks. All that is needed are the numbers to prove it.
But those numbers do not exist. And because of that, the current national debate over the role of race in police killings is being conducted more or less in a vacuum.
Researchers have sought reliable data on shootings by police officers for years, and Congress even ordered the Justice Department to provide it, albeit somewhat vaguely, in 1994. But two decades later, there remains no comprehensive survey of police homicides. The even greater number of police shootings that do not kill, but leave suspects injured, sometimes gravely, is another statistical mystery."