thats because the media is very much liberal controlled here, for instance how news of cops shooting lil dindu nuffins go national, while no one reports the black on black violence
dont trust any of the america news media, not even so called "entertainment" media as that is nothing but left wing brainwashing, just look at the acts on comedy central
http://controversialtimes.com/issues/constitutional-rights/12-times-mass-shootings-were-stopped-by-good-guys-with-guns/
This isn't because the media is "liberal controlled", really. That is a bumper-sticker sort of statement to make; possibly accurate to a decent degree, but far too simple and...slogan-y, you know? There's no cogent thought behind it, just a dichotomitic "DEMS DUH BAD GUYS, BOSS" mentality
Anyway, this coverage mostly happens because to the average cable news viewer, black-on-black gang-related violence is not as horrifying or shocking as one that can have more of a nasty overtone, like racially-motivated slayings. Not even saying that the overtone has to be based in reality, but it is much easier for the media to attribute this....or really, allow the ignorant sections of the public to attribute it for them.
And that shit sells far more thanc overage of simple, unfortunately monotonous drive-bys and shootings motivated by slangin' territory. I don't hold the belief that the media is actively guiding public opinion; but they are actively exploiting public opinion, functioning as an echo-chamber for the bumper-sticker types I mentioned earlier. All about the money, bruh.