Differences in Communal Police Agencies Describe the similarities and differences of four different police agencies with community policing departments. MUST include 5 sources. The expectation is for you to identify and research 4 real world police departments that have community policing programs. It is best to start your analysis off with a review of the principles of community policing. After you review the four departments then your concluding section should analyze how well those departments have implemented those principles.