Sexual offending runs in families: A 37-year nationwide study.

BACKGROUND: Sexual crime is an important public health concern. The possible causes of sexual aggression, however, remain uncertain. METHODS: We examined familial aggregation and the contribution of genetic and environmental factors to sexual crime by linking longitudinal, nationwide Swedish crime and multigenerational family registers. We included all men convicted of any sexual offence (N = 21,566), specifically rape of an adult (N = 6131) and child molestation (N = 4465), from 1973 to 2009. Sexual crime rates among fathers and brothers of sexual offenders were compared with corresponding rates in fathers and brothers of age-matched population control men without sexual crime convictions. We also modelled the relative influence of genetic and environmental factors to the liability of sexual offending. RESULTS: We found strong familial aggregation of sexual crime [odds ratio (OR) = 5.1, 95% confidence interval (CI) = 4.5-5.9] among full brothers of convicted sexual offenders. Familial aggregation was lower in father-son dyads (OR = 3.7, 95% CI = 3.2-4.4) among paternal half-brothers (OR = 2.1, 95% CI = 1.5-2.9) and maternal half-brothers (OR = 1.7, 95% CI = 1.2-2.4). Statistical modelling of the strength and patterns of familial aggregation suggested that genetic factors (40%) and non-shared environmental factors (58%) explained the liability to offend sexually more than shared environmental influences (2%). Further, genetic effects tended to be weaker for rape of an adult (19%) than for child molestation (46%). CONCLUSIONS: We report strong evidence of familial clustering of sexual offending, primarily accounted for by genes rather than shared environmental influences. Future research should possibly test the effectiveness of selective prevention efforts for male first-degree relatives of sexually aggressive individuals, and consider familial risk in sexual violence risk assessment.The Swedish Prison and Probation Service R&DThe Swedish Research CouncilThe Wellcome TrustThe CIHR Banting fellowship programPublishe

Best practice in the management of online sex offending

Our report sets out the outcomes from reviews of the relevant literature, and a series of consultations held by IWG_OSO, with participation from practitioners and researchers working in the field of child protection and online sex offending. Online sex offending. Internationally, researchers and practitioners have documented rises in the scale and impact of online sex offending, including the grooming of minors and vulnerable people for sexual purposes, sexual trafficking, and most dramatically, child sexual exploitation material and the related offences of its possession, production and distribution. Such a ‘high volume crime’ outweighs the capacity for effective management and prevention through the strategies and resources currently being used. This makes prosecution and case management increasingly difficult. Challenges to good practice.Without empirically based good practice, professionals are unable to deal effectively with the prevention of online sex offending, risk-management, and treatment decisions. This creates major limitations for the police, courts, probation, child protection, and other services, which are working to protect and safeguard children from online child sexual offenders, and to manage and prevent offending behaviours. Current issues and possible solutions. A series of current issues were highlighted, with possible solutions offered by IWG_OSO stakeholders. These included suggestions for changes in: international policy on CSEM offending; working with the internet industry; policing issues; research concerns; risk assessment and treatment developments; inter-agency and multi-disciplinary collaboration; barriers to change; and preventative methods.Conclusions.1. An increase in arresting and prosecuting offenders; 2. An increase in earlier interventions and primary and secondary prevention; 3. An increase in research to aid risk assessments, treatment options and prevention approaches; 4. An increase in international collaboration and consistency in applying learning to policy and practice

Construct Validity of Stable-2000 and Stable-2007 Scores

We addressed the construct validity of Stable-2000 and Stable-2007 scores by examining correlations between selected items and validated independent measures of relevant constructs in samples of convicted sex offenders. In Study 1, the Child Molester Attitudes item of the Stable-2000 shared 23% of the variance with a self-report measure of beliefs supportive of child molestation, r(19) = .48. The Deviant Sexual Interests items of the Stable-2000 and Stable-2007 shared 7% to 66% of the variance, respectively, with an offense-history-based measure of pedophilic interests, r(18) = .27 for the Stable-2000 and r(11) = .81 for the Stable-2007. In Study 2, the Lovers/Intimate Partners, General Social Rejection/Loneliness, Rapist Attitudes, and Child Molester Attitudes items of the Stable-2000 shared 4% to 19% of the variance with self-report measures of, respectively, intimacy, r(90) = -.44; loneliness, r(88) = .34; beliefs supportive of rape, r(72) = .21; and beliefs supportive of child molestation, r(78) = .36. The results generally suggest that the Stable items examined are associated with measures of similar constructs; however, the degree of convergence was lower than expected. More systematic and comprehensive research is needed to examine convergence of the Stable items with other relevant measures and additional aspects of construct validity. Such efforts will provide a clearer understanding of dynamic risk factors, appropriate areas of focus for treatment efforts, and, more generally, why some sex offenders recidivate

Severe Mental Illness Diagnoses and Their Association With Reoffending in a Sample of Men Adjudicated for Sexual Offences

The current study examined the relationship between mental illness and recidivism in a sample of 409 men adjudicated for sexual offences who scored higher than average on an established risk assessment tool (Static-99R). Participants were from all provincial correctional systems (except Prince Edward Island) and all regions of the Correctional Service of Canada. Severe mental illness diagnoses, with the exception of some personality disorders, were not associated with recidivism (after an average follow-up of 11 years). While some personality diagnoses were initially related to recidivism, this relationship often disappeared or was attenuated after controlling for substance misuse and risk score on the Static-99R. There were two exceptions: Histrionic and narcissistic personality disorders continued to predict sexual recidivism after controlling for Static-99R and substance misuse history. In sum, the current study suggests that severe mental illness diagnoses are not associated with higher rates of recidivism after accounting for risk score and substance misuse in men with sexual offences, with the exception of histrionic and narcissistic personality disorder diagnoses. For this reason, risk judgements that weigh both known risk factors and severe mental illness may overestimate an individual’s risk to reoffend

Viewing time measures of sexual interest and sexual offending propensity: An online survey of fathers

Relative viewing times (VTs)— time required to view and evaluate sexually salient images—discriminate justice-involved individuals with histories of sexual offending against children from those without such histories. In an online sample of 652 fathers, we measured VTs and sexual attraction ratings to sexually salient child and adult images. We assessed participants’ sexual offending history and propensity (self-reported likelihood to have a sexual contact with a child, a non-consensual sexual contact with an adult, and propensity toward father-daughter incest). In contrast with VT studies involving clinical or forensic samples, VTs and attraction ratings failed to discriminate participants with a sexual offending history (AUC = .51 [.34, .69], p = .900 and AUC = .50 [.36, .66], p = .980, respectively). VTs successfully distinguished participants with a propensity to sexually offend against children (AUC = .74 [.53, .89], p = .005) but failed to identify those with a propensity toward incest (AUC = .51 [.46, .56], p = .416). The opposite was found for attraction ratings (AUC = .58 [.38, .78], p = .413 for propensity to offend against children and AUC = .58 [.53, .63], p < .001 for propensity toward incest). VTs and attraction ratings were poorly correlated (r = .12 [.21, .21], p = .010). Results illustrate, for the first time, the distribution of VT measures in community fathers, support the feasibility of online administration of VT tasks to detect propensity to sexually offend against children, and indicate that sexual interest in children and incest propensity are distinct

A Meta-Analysis of Viewing Time Measures of Sexual Interest in Children

Due to unobtrusiveness and ease of implementation, viewing time (VT) measures of sexual interest in children have sparked increasing research interest in forensic contexts over the last two decades. The current study presents two meta-analyses of VT measures adapted to assess pedophilic interest to determine their discrimination between sexual offenders against children (SOC) and non-SOC groups as well as convergent validity (associations with other measures of sexual interest in children). On average, VT measures showed moderate discrimination between criterion groups (fixed-effect d = 0.60, 95% CI [0.51, 0.68], N = 2,705, k = 14) and significant convergent validity with self-reports, penile plethysmography, Implicit Association Tests and offence behavioral measures ranging from r =.18 to r = .38. VT measures, however, provided better discrimination for adults (fixed-effect d = 0.78, 95% CI [0.64, 0.92]) than adolescent samples (fixed-effect d = 0.50, 95% CI [0.40, 0.61]), Qbetween = 9.37, p = .002. Moreover, using pedophilic difference scores within adult samples substantially increased VT measures’ validity (fixed-effect d = 1.03, 95% CI [0.82, 1.25], N = 414, k = 7). Results are discussed in terms of their theoretical and applied implications for forensic contexts

Temporal Order of Sexual Offending Is Risk-Relevant for Individuals With Child Sexual Exploitation Materials Offences

The current study examined the extent to which the temporal order of sexual offending may be risk-relevant for men with Child Sexual Exploitation Material (CSEM; also referred to as child pornography) offences. We categorized 85 men who had committed two distinct sexual offences (CSEM or contact sexual offence) into three groups: (1) 47% (n = 40) followed a stable pattern, that is, men with CSEM offences who then committed a new CSEM offence; (2) 41% (n = 35) followed a de-escalation pattern, that is, men with contact sexual offences who then committed a CSEM offence; (3) and 12% (n = 10) followed an escalation pattern, that is, men with CSEM offences who then committed a contact sexual offence. Compared to the other groups, the stable group had more sexual interest in children, the de-escalation group had a younger age at first police involvement and more prior offending, and the escalation group had more substance use problems. We then examined recidivism (any new offence after the second sexual offence) and found that the escalation group had the highest 5-year and 7-year reoffending rates (start of follow-up: opportunity after the second sexual offence) for any crime, any non-sexual violence, any violence (including contact sexual offences), and any contact sexual recidivism. The de-escalation and stable groups had the highest CSEM recidivism rates. The current study suggests that ordering of offending within men adjudicated for CSEM offences is risk-relevant and that those who fit the escalation pattern may be at higher risk to reoffend