It could be that cops are more afraid of Blacks than Whites. (yes I'm not politically correct, but isn't being POLITICALY CORRECT the problem today ?)
The vast majority (77 percent) of white gun deaths are suicides; less than one in five (19 percent) is a homicide. These figures are nearly opposite in the black population, where only 14 percent of gun deaths are suicides but 82 percent are homicides:
http://www.brookings.edu/blogs/social-mobility-memos/posts/2015/12/15-guns-race-different-worlds-reeves
The number of youth who report that they carry weapons is significant. In 1997, 14 percent, or 1 in 7 male juveniles, reported carrying a gun outside the home in the previous 30-day period.9 In the inner city, the problem is more severe. One study involving 800 inner-city high school students reported that 22 percent said they carried weapons.10 An even greater number of convicted juvenile offenders reported carrying guns -- 88 percent, according to another study.11
http://www.ojjdp.gov/pubs/gun_violence/sect01.html