Washington Post said:
When Absalom Jordan hears the crack of gunfire outside his home in Southeast Washington, he reacts in an instant. “You get away from the windows and get down,” the 72-year-old said. “I have learned to live with it.”
Police are listening as well. Rooftop sensors monitor his neighborhood around the clock for the distinctive bang of a gun. The inconspicuous devices have logged hundreds of incidents over the past eight years near his apartment as part of a gunfire surveillance network called ShotSpotter.
About 39,000 separate incidents of gunfire have been documented by ShotSpotter’s unseen web of at least 300 acoustic sensors across 20 square miles of the city, according to an analysis by The Washington Post. The data, obtained through a public-records request, offer an unprecedented view of gun crime in a city where shooting a firearm is illegal in virtually all circumstances.