The impact of secondary exposure to gun violence fatality on mental health outcomes in four urban United States settings

•Gun violence fatality disproportionately affects racial/ethnic minorities.•Those exposed to gun violence fatality are at higher risk for suicidal ideation.•Exposure to gun violence fatality increases the odds of psychotic experiences.•Higher distress and depression levels are linked to gun violence fatality exposure.•Exposure to gun violence fatality is a social determinant of mental health.