Journal of Interpersonal Violence 1–17 © The Author(s) 2016 Reprints and permissions: sagepub.com/journalsPermissions.nav DOI: 10.1177/0886260516629387 jiv.sagepub.com Article The Role of Interpersonal Conflict as a Determinant of Firearm-Related Homicide–Suicides at Different Ages Bindu Kalesan, PhD, MPH, 1 Matthew E. Mobily, MD, MPH, 2 Sowmya Vasan, MS, 2 Michael Siegel, MD, MPH, 3 and Sandro Galea, MD, DrPH 3 Abstract Although firearm-related homicide–suicides and firearm-related suicides are tragic and catastrophic events, there is increasing evidence that the two events have different precipitants and that understanding these precipitants may help prevention efforts. We aimed to assess the role of interpersonal conflict (IPC) and recent crises in firearm-related homicide–suicides as compared with firearm-related suicides alone. We also assessed whether these differences were consistent across young and old perpetrators. Using an unmatched case-control study, we compared firearm-related homicide–suicides andsuicides alone from 2003 to 2011 in the National Violent Death Registry data to assess the risk associated with IPC and 1 Boston University School of Medicine, MA, USA 2 Columbia University, New York, NY, USA 3 Boston University School of Public Health, MA, USA Corresponding Author: Bindu Kalesan, Department of Medicine, Boston University School of Medicine, 801 Massachusetts Ave., Room 475, Boston, MA, USA. Email: kalesan@bu.edu 629387JIV XX X 10.1177/0886260516629387Journal of Interpersonal ViolenceKalesan et al. research-article 2016