there are clearly examples of shotspotter system working, even saving lives. and for years it's been used by police forces pretty uncontroversially. that was �*till lawyers around the country started to ask questions, difficult questions about how the tech actually works. they started wondering whether it's as accurate as the company claims, and if it isn't, what the consequences are for americanjustice, and those questions have been loudest here in the city of chicago. so talk me through, where are these actual shotspotter sensors here? you see the round ball thing, the black thing at the very top, that's the sensor up there. how do you feel when you see them? it makes me angry. michael williams was released from jail two months ago, having been accused of murder.