The effects of a deliberate strategy to bolster organizational change in order to achieve the goals of the Comprehensive Gang Model (CGM) were tested in this study. The CGM goals of increasing community capacity to address gang and youth violence and reducing gang and youth violence were examined. A quasi-experimental design was used wherein two Massachusetts cities received a relational coordination intervention to boost organizational change and two similar Massachusetts cities were used as comparisons. Surveys, observational notes, and crime data assessed outcomes of interest. The intervention was carried out from March 2016 through August 2017. Survey and observational data were gathered during that time. Crime data from January 2014 through December 2018 was utilized to examine outcomes.