SgtLumpy mentioned shot tracing technology.
http://www.extremetech.com/extreme/1...ith-audio-tech
Can pinpoint the shot to a 25 meter circle, close enough to get an address.
I used to live in a not so great area of Atlanta, and on the 4th of july the neighborhood sounded like a war zone. I am not talking about a few random shots, I am talking about hundreds of shots fired. Some were close, some were far, but I am pretty sure most of them were aimed at the sky and all of them had to land somewhere. It was nights like that made me happy I lived in a brick house.