Researchers from the Mailman School of Public Health at Columbia University prepared a case study of CODES (Community Outreach and Development Efforts Save). CODES is a coalition of 35 people and organizations in northern Manhattan committed to promoting safe streets, parks and schools. The case study analyzed the factors that prompted CODES' creation and implementation and the tensions that led to its demise. CODES demonstrated successes in: (1) Quickly mobilizing residents and leaders in a concerted effort to keep their neighborhood safe; and (2) Promoting and demonstrating leadership among Dominican people who suffer from negative stereotypes. CODES' successes were diminished by: (1) Member agencies' beliefs that the local City Council member's office exerted too much control and made unilateral decisions; and (2) Time and resource demands placed on overburdened agencies and people. A bibliography is included.