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  • Title: Criminal mutilation homicides in Japan: Corpse dismemberment and disposal pattern types, and offender characteristics.
    Author: Zaitsu W.
    Journal: J Forensic Sci; 2022 Nov; 67(6):2367-2375. PubMed ID: 35968713.
    Abstract:
    This study examined the offender characteristics of criminal mutilation homicides in Japan for offender profiling. The current sample (N = 108) showed that the most typical offender was a male, in his 30s (age that observed most often), one-person, and acquainted with the victim. This study highlighted that the cases of mutilation homicide differed in comparison with the regular homicide group in terms of the victim-offender (VO) relationship and the number of offenders. Furthermore, the multiple correspondence analysis classified mutilation homicides into four behavioral pattern types based on two dimensions (level of "efforts of corpse dismemberment" and "efforts of corpse disposal"). In the first type "high evidence destruction effort (n = 29)", having the greatest efforts to destroy evidence, all offenders were men. The rates of no VO relationship and serial murders were higher. In the second type "convenient disposal (n = 32)", likely to abandon victim body in home and trash, the rate of female offenders who assaulted family members was statistically significantly higher among the four types. In the third type "high geographic distance (n = 23)", traveling long distances for corpse disposal, the percentage of cases by co-offenders was likely to be higher than in the other types. Lastly, the offenders in "low evidence destruction effort (n = 24)" were likely to kill other acquaintances and have the least efforts for corpse dismemberment and disposal. From these results, the criminal profilers can estimate mutilation homicide offenders on the basis of efforts of corpse dismemberment and disposal.
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