The Milwaukee Journal Sentinel tells how the ShotSpotter system is helping police. Lt. Christopher Blaszak, a 20-year veteran who is assigned to the Central Investigations Division, is one of the lead evangelists for ShotSpotter. Two years ago, he said, ShotSpotter was just “dots on a laptop.” He has trained nearly 200 officers and several dozen prosecutors about how ShotSpotter works and what it can do to prevent crime and solve crime. He says ShotSpotter has figured in about 14 homicide cases in Milwaukee. “It’s good intelligence mixed with investigative analysis and technology,” Blaszak said. With the intensity of a programmer writing code for an app, Blaszak is skilled at looking at ShotSpotter data to help officers. He calls it predictive analysis. .