Look Where No One Else Wants To
It is understood that low-income communities attract more violence and criminal activity due to the lack of city maintenance and resources available however, safety is an issue problematic in societies of all extremes; day-cares, wealthy and middle class communities, college campuses, the White House, and even the most publicly detested--gangs and prisons.
It may seem atypical but a good and "out of the box" place to start could be by pursuing social groups (i.e. ex-cons, recovering drug addicts, etc.) who have had direct experience developing extreme safety methods to sustain their way of life and gurantee survival in rough and poverty areas. I think this backdoor approach could have the potential to uncover and pin-point areas of safety-weakness in today's urbanized, poverty areas.
Within every social group can be valuable knowledge.