Method of homicide and severe mental illness: A systematic review. (November 2017)

• Record Type: Journal Article
• Authors: Abreu Minero, Valeria; Barker, Edward; Bedford, Rachael
• Is Part Of: Aggression and violent behavior. Volume 37(2017)
• Page Start: 52
• Page End: 62
• Publication Date: 2017-11
• Subjects: Homicide method -- Homicide -- Severe mental illness -- Schizophrenia -- Mood disorders -- Symptoms; Aggressiveness -- Periodicals; Violence -- Periodicals; Violent offenders -- Periodicals; Electronic journals; 302.54
• DOI: 10.1016/j.avb.2017.09.007
• Languages: English
• ISSNs: 1359-1789

Abstract

Abstract: There is limited research that has examined offense characteristics in homicides committed by individuals with mental illness and with differing psychiatric diagnoses. The aim of this systematic review is to synthesize previous findings of studies analyzing homicide behavior by mentally ill individuals, and reporting any associations between mental illness and method of homicide. We searched four databases (MedLine, PsychINFO, Web of Science and Embase), and identified 52 relevant articles for analysis. Of these 52 articles, nine reported specific information on mental illness and method of homicide. Five out of nine articles revealed an association betweenschizophrenia/delusional disorder and the use ofsharp instruments as a method of homicide. Four out of nine studies revealed an association betweenmood disorders (bipolar disorder/major depression ) andstrangulation/asphyxiation/suffocation/drowning . Our review confirms consistency across studies reporting a significant association between close contact methods and schizophrenia/mood disorders. Also identified as possible influential factors concerning weapon choice are illness duration, victim characteristics and planning/lack of planning of the homicide. Additionally, studies revealed up to 96% of severely mentally ill offenders experienced psychiatric symptoms at the time of the homicide. Future research may examine the presence of specific psychiatric symptoms when a mentally ill offender commits a homicide and whether these may be more influential in the method of homicide used than the psychiatric diagnosis of the offender. Highlights: Two consistent associations between homicide method and mental illness were identified. An association between schizophrenia/delusional disorder and sharp instruments An association between mood disorders and strangulation/asphyxiation/suffocation/drowning Duration of the illness, victim type, and planning of the homicide are also influential to weapon choice. Up to 96% of offenders experienced psychiatric symptoms at the time of the homicide.