PROJECT SUMMARY: Youth violence, a major cause of morbidity and mortality that disproportionately affects African-Americans, is a pressing issue in need of targeted action given its negative impact on population health, well-being, and equity. This research project proposes to adapt, implement, and evaluate Take Charge!, a one-on-one mentoring violence prevention program, as a group mentoring model through a partnership between the YMCA of Central Maryland and Johns Hopkins University. The specific aims of the project are (1) through focus groups, key informant interviews, and an online survey, to determine what is needed to achieve readiness for staff of the YMCA of Central Maryland to work with at-risk youth who have been involved in violence-related events resulting in injury; (2) to adapt the Take Charge! curriculum to be appropriate for the group mentoring model; and (3) to conduct a pilot randomized trial in which assault-injured 10- to 15-year-old youth recruited from the emergency department are randomly assigned to standard care or Take Charge! group mentoring. Post intervention and at a six-month follow-up, the research will assess youth violence–related, mental health, and education outcomes using validated measures and mentor outcomes of knowledge, attitudes, and practices.