why are cities quitting Shotspotter technology?

Dayton, Ohio is saying bye-bye,bye to using shotspotter technology that had been alerting its police force to shots fired. Why did they stop using it? According to the Dayton Police Department, it was difficult to prove the effectiveness of the technology. Researchers say the microphones Shotspotter uses can count fireworks as shots, and can miss shots fired directly under the microphone.

Route Fifty | Why Dayton quit ShotSpotter, a surveillance tool many cities still embrace