Characteristics of Intimate Partner Homicide Perpetrators

Abstract:                                                  Abstract Introduction. Approximately 88.000 cases of assault were reported to the Swedish police during 2010. Twenty-five percent of these cases were considered as violence against women. Intimate partner violence (IPV) is a worldwide issue and poses a major threat to women’s health. In Sweden, 17 women are killed each year by an intimate partner. This study aimed at increasing the knowledge of perpetrators of intimate partner homicide (IPH), in terms of type of mental disorder and type of deadly violence exerted. Method. A total of 49 forensic psychiatric investigations were obtained from the Swedish National Board of Forensic Medicine in Huddinge. Eighteen perpetrators of IPH were compared to 31 perpetrators of deadly violence in a non-intimate relationship. Comparisons were made by coding principal diagnoses as described in the forensic psychiatric investigations, and type of deadly violence exerted using the Cornell coding guide for violent incidents. Results. Perpetrators of IPH were, to a greater extent, diagnosed with a dysphoric or borderline personality disorder (BPD), whereas perpetrators of deadly violence in a non-intimate relationship were significantly more often diagnosed with an antisocial personality disorder (ASPD). Perpetrators of IPH used more deadly violence with reactive features, whereas perpetrators of deadly violence in a non-intimate relationship used significantly more deadly violence with instrumental features. Discussion. The results of this study are in agreement with previous research. In conclusion, perpetrators of IPH are more reactive in their deadly violence and less antisocial, in terms of being diagnosed with ASPD and previous convictions, compared to perpetrators of deadly violence in a non-intimate relationship. This may be helpful in terms of preventing future risk for IPV and IPH.