I happened to start working with a similar system today. For our customer there are several factors they are interested in:

# Mapping gunshots in both time and space. These types of sensors can attempt to classify the type of weapon used based on the audio signature. If there are are several shots from similar-sounding sources moving through the city at a certain, or in a certain area over the period of days (or month), this can tell you more than you could determine from just emergency calls.

# Tieing the gunshot sensors in with other input devices, like cameras. You can reduce the time spent looking through, say, traffic camera recordings that happened in the vicinity of the gunshot looking for related video.

# Automatically pointing moveable cameras to look in the direction of a gunshot. Means you don't need as many camera for the same effective coverage.

Depends where you live. We've had gunshots in our neighborhood every day (or very nearly so) for 2+ weeks. I lost count of fatalities sometime around 9. Bit of a gang war going on here.

The ShotSpotter they put in last fall is definitely seeing some use here.

Gun violence is made up.