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An Investigation on Behavioral Pattern of Homicide in People with Psychotic Disorders, People with Personality Disorders and People without any Mental Disorders

Author Affiliations

  • 1 Legal medicine research center, Legal medicine organization, Tehran, Iran
  • 2 Department of psychology, Kish International Branch, Islamic Azad University, Kish, IRAN
  • 3 Department of Psychiatry, University of Social Welfare & Rehabilitation Sciences, Tehran, IRAN

Int. Res. J. Biological Sci., Volume 3, Issue (7), Pages 10-14, July,10 (2014)


Homicide is the act of a human killing another human. It is not always a punishable act under criminal law, and is different to murder from a formal legal point of view. The mental state of the perpetrator of these crimes differs from that of one who commits murder. The purpose of this study is to reach a criminal behavior pattern in three dimensions (i.e. motivation, criminal act, and behavior after the crime) which can solve some problems in process of judicial judgments and precise decision making. This research is a cross-sectional survey on a statistical society of all the people who have committed human killing since 2001 through 2009 and have been referred to Tehran Legal Medicine center to be observed by psychiatrists. Sampling method is targeted in which 230 people were selected randomly. Required information was collected through related documents archive. Statistical tests of x, data was analyzed and in terms of previous motivations, no significant difference was seen (p0.05, x=1.75). In terms of lethal weapons, a significant difference was seen (p0.05, =6.156). Also, in terms of the behavior after crime, some significant differences were seen in the groups (p0.05, =21.775). Every 3 groups of people with psychotic disorders, persons with personality disorders, and healthy ones have committed homicide with previous motivation. In terms of lethal tools, health ones often use lethal weapons to do homicide; and in terms of the behavior after crime, the psychotics mostly have unusual behaviors and do not leave the crime location.


  1. Cosmides L. and Tooby J., Are humans good intuitive statisticians after all? Rethinking some conclusions from the literature on judgment under uncertainty, Cognition,58, 1-73 (1995)
  2. Dawson J.M. and Langan P.A., Murder in families, Bureau of Justice Statistics special report,Washington, DC: U.S. Department of Justice; (1994)
  3. Personality disorders, Wikipedia, free encyclopedia website, http://en.wikipedia.org/wiki/Personality_disorders, Accessed September 16 ( 2012)
  4. Davis J.A., The use of behavioral scientists in low enforcement, The Low Enforcement Quarterly; January, 20-28 (1993)
  5. Turvey B.E., Criminal Profiling: An Introduction to Behavioral Evidence Analysis,San Diego: Academic Press; (1999)
  6. Homicide Wikipedia, free encyclopedia website, http://en.wikipedia.org/wiki/Homicide, Accessed September 6, (2012)
  7. Ganji H., General Psychology Principles, Tehran: Ravan; (1998)
  8. Crime, Wikipedia, free encyclopedia website. http://en.wikipedia.org/wiki/Criminal_act. Accessed September 14 (2012)
  9. Santtila P., Häkkänen H. and Canter D., et al. Classifying Homicide Offenders and Predicting their Characteristics from Crime Scene Behavior, Scand J Psychol., 44(2), 107-118 (2003)
  10. Robert D., Keppel R.D. and Walter R., Profiling Killers: A Revised Classification Model for Understanding Sexual Murder, Int J Offender Ther Comp Criminol,43(4), 417-437 (1999)
  11. Richard-Devantoy S., Chocard A.S. and Bourdel M.C. et al., [Homicide and major mental disorder: what are the social, clinical, and forensic differences between murderers with a major mental disorder and murderers without any mental disorder?], Encephale, 35(4), 304-314 (2009)
  12. Disease, Wikipedia, free encyclopedia website. http://en.wikipedia.org/wiki/Disease, Accessed September 17 (2012)