7. Project Summary Violence disproportionately affects African American youth. In addition to death and injury, violence exposure has significant psychological consequences, including traumatic stress symptoms and internalizing problems. Self-directed violence has shown startling and disproportionate growth among African American youth, with suicide rates nearly doubling from 2007 to 2018. Current prevention strategies have limited effectiveness, perhaps due to their failure to address the causal role of structural racism in violence. The primary aim of this proposed project is to examine the extent to which an intervention addressing structural racism in education and law enforcement reduces interpersonal violence and suicide among middle school-aged youth, with a focus on populations experiencing health disparities (African Americans; low-income communities). The proposed project will examine community-level changes using a multiple baseline experimental design that randomizes the start of the intervention in four communities, each comprising a police precinct and middle school. The intervention will consist of (a) school-based intervention components including a culturally responsive, community-inclusive adaptation of a whole-school climate intervention (School-wide Positive Behavior Interventions and Supports), and culturally responsive practices training and coaching; (b) law enforcement-based intervention components representing procedural justice interventions, including training in disproportionate minority contact, and training and coaching on de-escalation with trauma-exposed youth; and (c) an integrated community intervention that includes community-building between police officers, school personnel, and youth through team-oriented contact. Outcomes will be measured using archival data from the schools and police department as well as survey data from youth, school personnel, and police officers. Aim 1 is to evaluate the extent to which targeting structural and cultural racism reduces interpersonal violence among youth, as measured by individual-level, school-level, and precinct-level data. Aim 2 is to evaluate the extent to which targeting structural and cultural racism reduces suicidality among youth, as measured by completed suicides and proximal precedents for suicide, including attempts and ideation. Aim 3 is to evaluate the extent to which targeting structural and cultural racism reduces both overall rates and disproportionality of school- based exclusionary discipline practices; increases culturally relevant pedagogy; and reduces both overall rates and disproportionality of juvenile arrests and police use-of-force. Aim 4 is to evaluate specific intervention components by determining their effects on hypothesized mechanisms of change at the individual, teacher, school, and law enforcement levels. This intervention has the potential to reduce morbidity and mortality among African American youth, promote overall quality of life, an...