““Using ShotSpotter, The New York Times reports that neighbors called police only 10 percent of the time that guns were fired in a high-crime area of San Francisco. In Oakland, 22 percent of gunshots prompted 911 calls. Chief Chris Magnus of Richmond, Calif., a community of 120,000 north of Berkeley that routinely ranks among country’s most violent cities, recalled listening to a ShotSpotter recording of a gun battle in 2010 that involved more than 100 rounds fired from four guns. “It was just mind-boggling,” he said. “This is like 11 at night on a summer night, and nobody even called it in.”2””
