Has the suspect been caught?
If not, wouldn't a description of the suspect's nationality, I don't know, be a GOOD thing? It isn't racist: it's a DESCRIPTION of the suspect, so the populace can help locate him.
If someone is worried that incidents like this will negatively reinforce bad stereotypes, I don't know, maybe they should be working to make sure incidents like this don't happen rather than trying to manipulate how people react to these incidents? Woulddn't that be more productive?
The uncomfortable truth is this: there is something toxic within the black community. Hiding it, covering it with euphemisms and paternalistically "protecting" the black community from that truth is counter-productive. The best disinfectant is truth. The desire to fix things "in house" is always there. And it's usually a bad idea, especially when the black community, with ALL the respect in the world, hasn't shown a whole lot of luck in policing itself.
This incident is tragic, no matter the races of the perpetrator(s) or the victims. To keep things like this from happening again in the future requires that we look at it head-on and honestly, and not hiding behind people's hurt feelings.