Killings by juvenile offenders have been a matter of concern in the United States since the 1980s. Although the rate of juvenile-perpetrated murders has been declining since the 1990s, it remains problematic, in that juvenile offenders account for approximately 10% of all homicide arrests. Research on recidivism of juvenile homicide offenders (JHOs) is important, due to relatively short follow-up periods in prior studies and a recent Supreme Court ruling that struck down mandatory life sentences without the possibility of parole for juveniles convicted of murder. The present study was designed to explore long-term patterns of recidivism, and particularly violent recidivism, in a sample of 59 male JHOs from a Southeastern state who were prosecuted as adults for murder or attempted murder in the early 1980s, convicted, and sentenced to adult prison. Furthermore, the predictive utility of a juvenile homicide typology was analyzed, and the offenders who committed sexually-oriented murders were examined in-depth. The results indicated that close to 90% of released offenders have been rearrested during the 30-year follow-up period, and more than 60% have been rearrested for violent offenses. Five offenders completed (4 offenders) or attempted (1 offender) a new homicide. Out of 7 variables tested, race emerged as the only significant correlate of post-release violence. Release from prison, post-release arrests, and post-release violent offenses were not significantly related to the circumstances of the index homicide (crime-oriented v. conflict-oriented). The subsample of juvenile sexual homicide offenders (JSHOs) consisted of 8 offenders; 6 of them were released from prison, 4 were rearrested, and 3 were rearrested for violent offenses. None of the released JSHOs were arrested for a homicide or any sexually-related crimes. The implications of the findings for management of JHOs, the comparability of this study to prior studies, and directions for future research are discussed.

Sexual homicide is a rare occurrence. Little is known about the offending perspective of sexual homicide from a criminological standpoint. Recently, Chan, Heide, and Beauregard (2011) proposed an integrative theoretical framework using concepts and propositions of Social Learning Theory (differential association, definitions, differential reinforcement or punishment, and imitation) and Routine Activities Theory (a motivated offender, an attractive and suitable target, and the absence of a capable guardian or guardianship) to elucidate the sexual homicide offending dynamics. According to this integrative model, the individual-level view of the sexual murderers is explained by the social learning principles, while the offending process is complemented by the routine activities propositions from a micro-level to provide a better explained sexual homicide offending model. However, this model has yet to be tested empirically. In addition to testing the Chan et al.'s model, this study proposes and tests an alternative model by incorporating the construct of pre-crime precipitators to better explain the motivating factor of an offender to commit a sexual homicide. To empirically test both models, this study utilizes the dataset collected by a group of Canadian researchers on 230 incarcerated non-serial homicidal (N = 55) and non-homicidal (N = 175) sex offenders in the province of Quebec, Canada for the period between 1995 and 2005. Using step-wise logistic regression, four regression models are tested to examine the offending process of sexual homicide by investigating the effects of the offender's motivation, the target suitability and attractiveness, the absence of a capable guardian or guardianship, and the pre-crime precipitating factors in deciding the lethal outcome of a sexual offense. The theoretical model proposed by Chan and colleagues received some support. Consistent with Chan et al.'s theoretical propositions, findings suggest that the sex offender's sexually deviant behaviors and attitudes serve as a motivating factor, and the presence/absence of a capable guardian or guardianship at the immediate crime surroundings are significant factors in deciding the survival rate of the victim. Methodological limitations of the study, practical implications for offender profiling and crime preventive measures, and suggestions for future research are discussed.

Foreign object insertion into the vagina of a murder victim is a rare occurrence. When it is encountered it is often seen as an indicator of a sexual murder, or regarded for signature analysis purposes. Due to its rare occurrence it is often only documented in literature in case-study form. In this research seventeen cases of vaginal foreign object insertion were analysed, by far the largest study of this occurrence to date. Cases were only included in the research if the object was still in the vagina when the body was discovered. The research set out to determine the typical victim profile, crime-scene actions, and offender profile, with the intention of assisting in the profiling of these crimes in the future. There were distinct differences amongst the victims in terms of race, occupation, time of death, cause of death, circumstances and area of the crimes. Only six of the seventeen crimes had been solved, yet amongst the eight known offenders certain common characteristics were observed. / Dissertation (MA)--University of Pretoria, 2007. / Social Work and Criminology / unrestricted

Le but de notre étude était de déterminer des variables du modus operandi de meurtres sexuels prédisant la résolution de l’enquête policière. Notre échantillon incluait 265 homicides sexuels de femmes codifiés dans le ViCLAS. La comparaison entre des meurtres sexuels résolus (N=178) et des meurtres sexuels non résolus (N=87), devait également permettre d’identifier les différences entre les issues de l’enquête, les stratégies du meurtrier pour éviter l’appréhension ainsi que les facteurs prédisant la résolution. D’après l’analyse de régression logistique, les prédicteurs tels que l’utilisation d’une arme, l’utilisation d’un bandeau/bâillon et l’agression impliquant une introduction par effraction ou un vol augmentent les probabilités que l’agresseur soit appréhendé. Au contraire, lorsque l’agresseur emporte un objet et que la victime est piétinée, les chances de résoudre l’enquête diminuent. Ces variables du modus operandi traduisent un déficit des compétences criminelles du meurtrier qui peut le pousser à multiplier les erreurs. De manière générale notre étude nous apprend que le contact rapproché entre l’agresseur et la victime favorise la dispersion d’indices propices à la résolution de l’enquête. Le nombre de ces indices est décuplé lorsqu’il y a pénétration vaginale ou anale et lorsque la victime est battue ou mordue. En outre, des contraintes intrinsèques à l’utilisation de stratégies d’évitement expliquent le fait que ces moyens, entravant l’avancée de l’enquête, ne sont que rarement exploités. Enfin, la faible proportion d’actes sexuels et violents observés dans ce genre de crime entrave le processus de résolution. Il en va de même pour l’impact limité des bases de données et de la spécialisation du meurtrier sexuel. / The aim of our study was to determine the characteristics of the modus operandi involved in sexual murder predicting clearance of police investigation. Our sample involved 265 sexual murders of women codified in the ViCLAS. The comparison between solved sexual murders (N = 178) and unsolved sexual murders (N = 87), should also help to identify the differences between issues of the investigation, the killer strategies to avoid detection and the factors predicting clearance. According to logistic regression analysis, murders involving use of a weapon, use of a blindfold/gag and aggression involving home intrusion or robbery are more likely to be cleared. On the opposite, when the murderer takes an object from the crime scene or when victim is stomped, the clearance rate decreases. These variables reflect a lack of criminal skills which can drive the murderer to make more mistakes. In general, our study reveals that close contact between the aggressor and the victim favors the dispersion of proofs facilitating the work of investigators. Such proofs are more likely to be spread when there is vaginal or anal penetration. The same process is involved when the victim is beaten or bitten. Moreover, most of the sexual murders are not able to clean the crime scene to avoid apprehension because of limited criminal skills. Finally, the low proportion of sexual and violence acts hinders the process of resolution. The same thing is observed concerning the limited impact of databases and specialization of sexual murderer.

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