The last two years have seen dramatic spikes in homicides and other violent crimes in many U.S. cities. Among the more than five dozen large jurisdictions surveyed by the Major Cities Chiefs Association (MCCA), homicides rose 15.6% in 2015 and another 9.8% in 2016. While much of the overall increase can be attributed to a few cities, the fact remains that homicides rose in nearly two-thirds of the jurisdictions the MCCA surveyed over the last two years. There is one common element in almost all of these cities: much of the recent increase in violent crime is being driven by increases in gun crime. This report examines one of these promising technology-based applications: the Crime Gun Intelligence Center (CGIC) model.