A systematic review of the literature comparing male non-serial sexual killers and sexual aggressors: examining homogeneous and heterogeneous characteristics of these groups

ABSTRACT

This systematic review considers what is known about the characteristics of sexual killers and sexual aggressors. The aim was to identify which characteristics have consistently been shown to be similar (homogeneous) and which are different (heterogeneous) across these two groups. Ten studies, including approximately 300 sexual killers, were analysed. Only studies where the samples were directly compared and where sexual killers were male, predominantly non-serial and perpetrated against adult female victims were included. Results indicate that levels of loneliness and anger appear to be more prevalent in the sexual killer sample while mental health disorders, criminal history, family structure and history of sexual abuse as well as some crime scene behaviours seem to be similar across the two groups. The results of this review have also highlighted some methodological problems inherent to these types of studies and these issues are discussed from the perspective of improving research on these crimes.     

Adolescents’ level of knowledge of and supportive attitudes to sexual crime in the Swedish context

ABSTRACT

The aim of the present study was twofold. First, we wanted to quantify the level of knowledge of Swedish young people regarding sexual crime and to evaluate their supportive attitudes, while at the same time we aimed at identifying, through self-report, the sources that most contribute to such knowledge and attitudes. A sample of 245 upper secondary school students was selected from five schools in four Swedish counties. The results indicate that adolescents in Sweden have a high level of knowledge of rape, sexual molestation/harassment, and sexual exploitation of a dependent person. Furthermore, they show non-supportive attitudes to rape, sexual harassment, and sexual crime in general. However, some issues related to these types of crime proved to be confusing to the participants and, therefore, require targeting in education policies, specifically among juvenile males and those born abroad. The results are discussed in the context of the needs for sexual crime prevention.     

Predicting multiple victim versus single victim sexual abuse: an examination of distal factors and proximal factors associated with the first abuse incident

Abstract

Official and confidential self-report data on 83 convicted adult male sexual abusers were analysed to examine whether sexual offending progression can be better predicted from distal antecedents, or from proximal antecedents and outcomes associated with the first sexual abuse incident. Fifty-six offenders who sexually abused more than one victim (multiple victim offenders; MVOs) were compared to 27 offenders who sexually abused a single victim only (single victim offenders; SVOs). MVOs were younger at the time of their first sexual abuse incident, and were more likely to first abuse male and non-familial children. With the exception of sexual attraction to male children, no differences were found between the two groups on distal antecedents. Proximal antecedents and outcomes associated with the first sexual abuse incident were significantly related to multiple victim offending. Logistic regression analysis identified the presence of sexual difficulties in the month prior to the first abuse incident, and sexual excitement immediately preceding the first incident, as significant unique predictors. Implications for risk assessment and risk management are discussed, and future research directions proposed.     

A cognitive-based indicator of deviant sexual interest: Concurrent validation of the Stroop task

ABSTRACT

One of the strongest predictors of sexual recidivism is sexual deviance [Hanson, R. K., & Bussière, M. T. (1998). Predicting relapse: A meta-analysis of sexual offender recidivism studies. Journal of Consulting and Clinical Psychology, 66, 348–362. doi:10.1037/0022-006X.66.2.348]. Phallometric testing, the most commonly used method of assessing sexual deviance, has elicited methodological and ethical criticisms, while self-report is vulnerable to social desirability and poor insight. To overcome these limitations, researchers have utilised cognitive measures, including a modified Stroop task, to measure deviant sexual interests among sex offenders using victim selection as a comparison measure. However, the results have been inconclusive. The current study explored the validity of the modified Stroop task as a measure of deviant sexual interest among a non-offending sample of 570 females and 223 male participants, using self-report as the comparison measure. The results indicated a significant gender difference in concurrent validity; there was a significant relationship between self-reported deviance and deviant word Stroop performance for male but not for female respondents, suggesting the Stroop is a viable option for assessing sexual deviance among males. Implications of these findings are discussed relative to sexual recidivism risk assessment.     

Relapse prevention: Critique and reformulation

Abstract

This paper challenges accepted notions about the importance of cognitive distortions expressed by child molesters. First, we consider the role of excuse-making in a healthy life, and as a result question whether it is in the best interests of our clients to challenge their distortions. We examine the literature on eyewitness reports and the reconstructive nature of memory to call into question the value of requiring child molesters’ reports of their offence to match the victim's account. Next we show that the evidence does not demonstrate convincingly that cognitive distortions are criminogenic. Furthermore, the responses of child molesters to measures of cognitive distortions indicate that they simply endorse less disagreement with the items than do others. However, we note that some of these distortions, while not criminogenic, may nevertheless interfere with the acquisition of skills for important treatment targets (e.g. relationships). We offer suggestions for the most effective way to elicit and change these distortions.     

Running the gauntlet: An examination of initiation/hazing and sexual abuse in sport

Abstract

When does sport initiation become sexual abuse? What can sport organisations do to ensure that the practice of sport is a safe and high quality experience for all? In this paper research on the initiation practices used by the military and North American universities and sport teams is used to explore links between such practices and physical and sexual abuse. In particular, the dynamics of peer abuse, consent and expressions of masculinity are examined. We question whether there can be acceptable initiation practices in sport (Hoover, 1999) and challenge the place of these ‘macho rituals’ (Weinstein et at, 1995) in sport. We make particular use of an expanded version of the continuum of sexual abuse (Brackenridge, 1997b) and of the sport imperatives identified by Kirby, Greaves and Hankivsky (2000). The paper concludes with recommendations for best practices in athlete-centred sport.     

男性间同性与虽奸问题的犯罪化研究

在我国,当前多发的男性间同性强奸案件囿于没有刑法的明文规定,公权力对这类案件的处理方式上存在时空的差异,并体现出一种冲突的状态,使得同样严重的性侵犯行为,法律适用上却不平等。本文从男男强奸行为的现状和特点出发,探讨了应将男性间同性强奸行为纳入刑法强奸罪的规制范围的必要性,提出了相应的立法建议,并需要随着社会的发展对其进行不断完善。     

A comparative study of two extraction methods routinely used for DNA recovery from simulated post coital samples

In sexual assault cases DNA profiling of spermatozoa can be of critical importance. Most methods use differential extraction of the spermatozoa to separate it from the female component. Here we have compared two commercially available differential extraction methods, the QIAamp^® DNA mini kit (Qiagen) and Differex™ with the DNA IQ^® System (Promega). Simulated postcoital samples were prepared using buccal cells from a female donor and spermatozoa from three male donors. A dilution series ranging from neat semen to a 1:1500 dilution (semen:dH₂O) was prepared and mixed with an equal volume of saliva from a female donor. Extraction efficiency was assessed using DNA concentration measured with NanoDrop 2000 and Quantifiler^® Human DNA Quantification Kit and the profile count of full, partial and mixed DNA profiles generated using SGM Plus and PowerPlex^® ESI 17. Statistical analysis was carried out using Randomisation in R, which is a robust model making no assumption of the distribution of data. Based on the amount of DNA extracted and the types of profiles no significant difference in the performance of the two extraction kits was seen. However, the processing time taken with the Differex™ System was about half than that of the QIAamp^® DNA mini kit and involved fewer liquid transfers.