The model for both SPI and BCJI sites integrates police-community collaboration into their programs. The workshops examined the challenges and successes in police-community collaboration for the sites represented. Each workshop included a similar range of workshop topics, including building and sustaining multi-sector collaborations, collaborating with communities of color, learning the perspectives of community leaders, using technology in collaboration, and creating a culture of collaboration in police agencies. The collaboration principles outlined for police are to exert strong leadership in promoting collaboration with community leaders; to orient police priorities toward service to the community; to transform training to include a focus on collaboration with community residents; to build community relationships; to engage with diverse elements of the community; to improve communication and messaging; and to understand community perspectives. Collaboration principles are also outlined for community residents. They include identifying leaders with credibility and support in the community to communicate regularly with police leaders; provide community input on officer training curriculum and the impact of police strategies in countering crime; participating with police in training exercises and problemsolving projects; defining public safety and neighborhood priorities from the community's perspective; and commending positive police work and recognizing officers who are models of police service to the community. Next steps being planned to promote police-community collaboration are discussed.