“The thing about shots being fired in a big city like Detroit, most people don’t call the police when shots are fired,” said Cmdr. Darrell Patterson. That’s where ShotSpotter technology comes in. “Whenever a ShotSpotter run comes out, [officers] can respond instantly, they can respond on their own…A lot of the times we are able to catch people right on the scene,” Patterson said, “after they have fired shots.”