THERE'S A SECRET TECHNOLOGY IN 90 US CITIES THAT LISTENS FOR GUNFIRE 24/...

Published on Jul 3, 2017

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The technology responsible for alerting the NYPD to Ortiz's shooting is known as ShotSpotter, whose 16-year-old parent company went public on June 7. In more than 90 cities across the US, including New York, microphones placed strategically around high-crime areas pick up the sounds of gunfire and alert police to the shooting's location via dots on a city map.