So what, big deal. Could they have been less specific on the discriptions of the shotter and those shot. You know like race, hair color, possible ethnicity, accent, weight, height and etc.
Ok so we know so far that they were men and in their 20's. Perfect that should narrow it down to about 20% of the local population, assuming they were local.
Ok another clue being possible gang related. Did they mean street gangs like the Bo Gars or organized gangs like the Mafioso?
Also why does it nessarly need to be gang related. Maybe they owed a lone shark money and didn't pay up or he fucked his underage sister or something. Could we be even more sketchyer on the details?