Solo Offenders Research Articles

Juvenile sex offenders in a Dutch mandatory educational programme: Subtypes and characteristics

Significant differences between subgroups of juvenile sex offenders (JSOs) are found in both Dutch and international research. Most of this literature represents the more delinquent and more disturbed sections of the population of JSOs. This paper describes the characteristics of 302 less disturbed and less violent JSOs in a mandatory educational programme. Characteristics of exhibitionists (n=26), child molesters (n=39) and peer offenders (n=237) are compared. Peer offenders are subdivided into solo offenders (n=90) and group offenders (n=142). Variables are: demographics, family background, psychosocial functioning, offence characteristics and victim characteristics. Significant differences are found in a large number of variables, supporting findings from earlier research in clinical samples. Differences between subgroups are largest between group-offending peer offenders, on one hand, and exhibitionists and child molesters on the other hand. The majority of our sample seems to have an ordinary background and shows no apparent sign of psychosocial dysfunction. The clinical and theoretical relevance of the results is discussed.

Women Don’t Do Such Things! Characteristics of Female Sex Offenders and Offender Types

The authors studied offender, offense, and victim characteristics in a cohort of 111 adult female sex offenders comprising all female sex offenders known to the criminal justice authorities in the Netherlands between 1994 and 2005. In 77% of the cases, the female sex offenders had abused children; almost two thirds of the women had co-offended with a male co-offender. Their backgrounds are on average problematic with sexual abuse being prominent (31%); mental disorders were also prominent (59%). Using multiple correspondence analysis, the authors distinguished four prototypical offender types. They identified the young assaulter and the rapist who are relatively young solo offenders. Two prototypes, the psychologically disturbed co-offender and the passive mother, comprise older women. They mostly abused their own children together with their male/intimate partner. These prototypes partly overlap with previous typologies. The authors discuss implications for theory and treatment.

Autism Spectrum Disorder Symptoms in Juvenile Suspects of Sex Offenses

To investigate autism spectrum disorder (ASD) symptoms in juvenile suspects of sex offenses. A group of 175 juvenile suspected sex offenders (all males, mean +/- SD age = 14.9 +/- 1.4 years) was compared with a matched healthy control group (N = 500, mean +/- SD age = 14.0 +/- 1.4 years) and a group of children with DSM-IV-diagnosed ASD (N = 114, mean +/- SD age = 14.2 +/- 1.9 years) with respect to autistic symptoms as measured by means of a standardized questionnaire, the Children's Social Behavior Questionnaire. Furthermore, specific subgroups of sexual offenders, i.e., child molesters, solo peer offenders, and group offenders, were compared with regard to levels of ASD symptoms. The study was conducted from May 2003 to December 2006. Significantly higher levels of ASD symptoms were found in juvenile sex offenders than in healthy controls, while levels were lower than in the ASD group (F = 148.259, p < .05). Solo peer offenders and child molesters scored higher on several subscales as well as on core autistic symptoms than group offenders (F = 5.127, p < .05). Levels of ASD symptoms are higher in juvenile suspects of sex offenses as compared to the healthy population, which argues for considering specific diagnostic assessment in this population, especially in solo offenders and child molesters.

Moral development of solo juvenile sex offenders

This study compared the moral development of solo juvenile male sex offenders (n = 20) and juvenile male non-offenders (n = 76), aged 13–19 years, from lower socioeconomic and educational backgrounds. The Moral Orientation Measure (MOM) was used to assess punishment- and victim-based moral orientation in sexual and non-sexual situations. Moral judgement was assessed with the Sociomoral Reflection Measure – Short Form (SRM-SF), with questions added on sexual offending and the offender's own victim(s). Offenders did not differ from non-offenders in victim-based orientation, but they showed weaker punishment-based orientation in sexual and non-sexual situations. No differences in moral judgement were found. However, lower stages of moral judgement were observed when the offenders’ own victim was involved, confirming specific moral deficits in solo juvenile sex offenders. Delay in moral judgement proved to be associated with cognitive distortions. It was concluded that the treatment of solo juvenile sex offenders should challenge own victim-related cognitive distortions.

Co-Offending and the Age-Crime Curve

It is proffered rather frequently that co-offending is the dominate form of criminal offending among juveniles because of the enhanced salience of peer pressure during adolescence, and that this enhanced propensity to co-offend is pivotal for understanding the age-crime curve. Using National Incident-Based Reporting System (NIBRS) data for 2002, the authors conduct an analysis of 466,311 criminal arrests drawn from seven states. Their findings indicate that co-offending patterns by age are not noteworthy in elucidating why participation in illegal activities rises in adolescence, peaks in early adulthood, and then declines thereafter. Once co-offending is differentiated from solo offending, with solo offending representing the bulk of criminal activity among all age groups, including juveniles, a curvilinear relationship remains between age and solo-offending and between age and co-offending. These nonlinear associations are not conditioned by an offender's sex, race, or by offense type. The authors also analyzed co-offending crimes reported to police. In many types of crimes, offenders and victims come into contact, thus allowing for the estimation of the perpetrator's age notwithstanding whether an arrest was made. The findings generated in this supplemental analysis are similar to those produced using the arrest data. The results of this study have consequential theoretical implications not only because they cast doubt on the assertion that differences in co-offending levels between juveniles and adults account for the age-crime curve, but they also contravene the widely held belief that most juvenile offenses are perpetrated in the company of others rather than by individuals acting alone. Based on the new data reported here it appears that group offending is merely incidental in circumstance and thus of little etiological significance.

Female Sex Offenders: A Comparison of Solo Offenders and Co-Offenders

Even though much of the prior sex offender literature focuses on males, recent research has included females as offenders. Such research, however, has been limited by small sample sizes. Several researchers have proposed typologies of female sex offenders that include both females who act alone (i.e., solo offenders) and females who act with another person (i.e., co-offenders), often a male. The current research includes a cross-national sample of 123 females who were solo offenders and 104 who were co-offenders. It was found that the two groups of females were not significantly different in regard to their age, race, time of offense, and the location of the offense. Co-offenders were more likely than solo offenders to have more than one victim, to have both male and female victims, to be related to the victim, and to have a nonsexual offense in addition to the sexual offense listed.

Female Sex Offenders: A Comparison of Solo Offenders and Co-Offenders

Female Sex Offenders: A Comparison of Solo Offenders and Co-Offenders

Juvenile Sex Offenders: Differences between Group and Solo Offenders

We report on findings from a study into differences in personality and background characteristics between juvenile sex offenders who commit their sex offenses on their own and those who do so in a group. Solo offenders were found to score significantly higher on neuroticism, impulsivity and sensation seeking, but scored lower on sociability. In addition, the solo offenders in the sample were more often recidivists for sexual offenses, and were more often themselves a victim of a sexual offense. Solo offenders were significantly older than juveniles who had committed a sexual offense with a group. On the basis of these results we recommend differential treatment for the two types of offenders.

Differential association in group and solo offending

The relationship between association with deviant peers and offending is a longstanding interest in criminology, however, the mechanisms that produce the relationship are seldom investigated. As a result, theoretical links between differential association and offending are often speculative. Differential association theorists maintain that interaction with deviant peers results in cognitive changes that make offending more attractive. Others contend that peers' influence on offending is enacted via group situations where associates encourage crime by offering opportunities or situational inducements. Using data from the National Youth Survey (NYS), this study explored the influence of delinquent friends' behaviors and attitudes on general, group, and solo offending for three crimes. OLS regression analyses supported differential association theory as originally written and no evidence was found that its effects were contingent on the presence of co-offenders. Implications of this exploratory analysis for differential association theory are provided along with directions for future research.