RecruitingBehavioural interventionPreventing Firearm Violence in Youth: A Hospital-based Prevention StrategyThe goal of the study is to understand if hospital-based violence interventions are effective for reducing youth violence among violently injured youth. This study will allow researchers to learn more about the intervention's effectiveness. The researchers also want to understand if the violence intervention impacts other behaviors, such as firearm use, drug use, aggression, risky behaviors, and rates of violent re-injury.