Doom, you missed my point. I'm not claiming that the problems never occured prior to the development or new nightlife; my point is that as the development and nightlife continue to become more prominent in that part of town, there will likely be more instances of people being in the wrong place at the wrong time - innocent bystanders that get caught up in this kind of violence.
Add to the fact that the more people you add into any area late at night who have been drinking, etc (which you cannot possibly argue hasn't happened in the last few years in that part of town), the more likely it is for problems to arise, and you just have a situation that is going to need to be addressed.