From left: Chicago Police Department Deputy Chief Larry Snelling, ShotSpotter CEO Ralph Clark and Ald. Carlos Ramirez-Rosa (35) during a City Council committee hearing on Friday.

The ShotSpotter gunshot detection technology has “exceeded” the requirements laid out in a multi-year contract with Chicago, city officials said Friday. But without a process to vet how often the technology is leading police astray, multiple aldermen said the city needs to raise its standard for the service costing taxpayers $9 million per year.