In Chicago they will respond to them aggressively . Gang members have figured this out and will have “decoy” shots fired before a hit takes place to tie up police.

What a perfect example of Campbell's Law.

Is there any verifiable third party evidence that ShotSpotter (or whatever it’s called now) can even do what it claims to?

When there was shooting outside of my apartment, shot spotter called the cops instantly.

It isn't supposed to govern the city, it's only supposed to spot the gun shots.