concerning cop killings, it turns out that blacks are shot at a slightly lower rate per 100,000 than are whites. This is true for Houston and there is no reason to assume Houston is more black-friendly than LA or NY or Chicago.
However virtually everywhere in the US blacks are hugely more liable to be subject to non-fatal use-of-force encounters with the police.
http://www.economist.com/news/united-states/21702219-are-black-americans-more-likely-be-shot-or-roughed-up-police-quantifying-black-lives?frsc=dg%7Ca
Even unconscious bias favors blacks over whites when it comes to being shot by a cop
http://www.washingtontimes.com/news/2015/jan/5/police-officers-more-hesitant-to-shoot-black-suspe/