Gun crime incident reviews as a strategy for enhancing problem solving and information sharingAbstract Over the last several decades, police departments and other criminal justice agencies have seen a shift toward a proactive problem-solving response to crime problems. This problem solving orientation has often included an emphasis on expanded partnerships across criminal justice agencies as well as with a variety of community stakeholders, including researchers. This manuscript uses the issue of gun violence as a lens through which to examine the organizational and inter-organizational changes necessary to apply a data-driven, proactive, and strategic policing-led response to gun homicides and non-fatal shootings in four Midwestern sites. Each site adapted a unique data collection process and incident review. The data collection, incident reviews, and the varying models developed across the four cities, provide a reflection on corresponding organizational and inter-organizational changes that illuminate the movement toward this proactive, data-driven, problem solving model of criminal justice. Fulfilling the promise of the incident reviews, however, requires internal organizational and cross-agency inter-organizational collaboration to align people, systems, and resources with this proactive, problem-solving model. Additionally, effectively implementing these organizational and interorganizational changes appears dependent on commitment and leadership, collaboration and partnerships, data quality and availability, and training and communication within and across organizational boundaries.