Differentiation of vaginal cells from epidermal cells using morphological and autofluorescence properties: Implications for sexual assault casework involving digital penetration

This work explores morphological and autofluorescence differences between vaginal and epidermal cells detectable through Imaging Flow Cytometry (IFC), a non-destructive, high-throughput technique. These differences were used to build a predictive framework for classifying unknown cells as originating from vaginal or epidermal tissue, which was tested on hand swabbings with and without digital penetration. Many more cells possessing a vaginal signature (median posterior probability ≥0.90) were detected in digital penetration samples than control hand swabbings. Minimum interpretation thresholds were developed to minimize/eliminate false positives; these thresholds were also effective when screening licked hands, indicating the potential utility of this method for a variety of biological mixture types and depositional events relevant to forensic casework.     

Simulations of child sexual abuse interviews using avatars paired with feedback improves interview quality

We tested whether simulated child sexual abuse (CSA) interviews with computer-generated child avatars could improve interview quality. Feedback was provided not only on question types, as in previous research, but also on whether the conclusions drawn by the interviewers were correct. Twenty-one psychology students (average age M = 24.5) interviewed four different avatars which had a simulated story of either abuse or non-abuse. The participants were randomly divided into two groups: one received feedback on question types and conclusions after each simulated interview and the other one did not receive any feedback. Avatars revealed pre-defined ‘memories’ as a function of algorithms formulated based on previous empirical research on children's suggestibility. The feedback group used more open-ended and fewer closed questions. They also made more correct conclusions and found more correct details in the last two interviews compared to the no-feedback group. Feedback on both the question types and conclusions in simulated CSA interviews with avatars can improve the quality of investigative interviews in only one hour. The implications for training practice were discussed.     

Sex differences in the experience of child sexual victimization

This study analyzed 390 (303 girls and 87 boys) cases of child sexual abuse to understand sex differences in child sexual victimization. Analyses focused on three domains that have received considerable empirical attention: victims' relationships with the offender, type and extent of abuse, and disclosure. Findings largely replicated previous efforts that reported sex differences in terms of victims' relationships with offenders. Although results also replicated previous findings about sex differences in disclosure patterns, these sex differences were minor in comparison with similarities in the way most instances of abuse were eventually identified. In terms of type and extent of abuse, results were the opposite of previous findings: girls, not boys, were the victims of more physical injury, violent threats, and use of force; and girls, not boys, were more likely to have physically resisted abuse. Divergences in findings were interpreted in terms of memory biases and social forces operating differently on the sexes.     

An estimate of the proportion of drug-facilitation of sexual assault in four U.S. localities

In recent years, drugs including flunitrazepam, gamma-hydroxybutyrate, ketamine, and ethanol, have become popularly associated with drug-facilitated sexual assault. Other drugs are also candidates as factors in "drug facilitated sexual assault" (DFSA). The true extent of DFSA is not known, and is difficult to estimate. We recruited sexual assault complainants at four clinics in different parts of the U.S. to anonymously provide urine and hair specimens, and to answer questions about suspected drugging, drug use, and the sexual assault incident. Urine and hair specimens were tested for 45 drugs, including ethanol, and those pharmacologically capable of inducing sedation, amnesia, or impairment of judgment. Analytical test results were used to estimate the proportion of subjects, and the proportion of all complainants to the clinic in the same time period, who were victims of DFSA. Overall, cases of 43% of 144 subjects, and 7% of 859 complainants, were characterized as DFSA. Subjects underreported their use of drugs. The role of toxicological results and history in characterizing DFSA cases is discussed.     

In their own voices: Report of a study on the later effects of child sexual abuse

Abstract

The purpose of this American study was to explore the later effects of sexual abuse in females. in pre or early adolescence. Based on interviews mith a sexually abused group and a comparison group. the study found that incidents of sexual abuse led to numerous harmful later outcomes for their victims. In contrast to a similar but non abused sample, the victim of abuse were characterized by: harboring thoughts of depression. death and suicidal ideation; experiencing lower self-esteem; having fewer close friends; experiencing more verbal altercatfons with their parent or parents; running away from home; having multiple sexual partners; engaging in sexual acti vity a t an earlier age; not using birth control; having an increased chance of becoming pregnant. andor an increased risk of contracting sexually transmitted disease, including HIV and AIDS. Based on these harmful later outcomes. there are many serious implications for child weUm policy and practice. The study's respondents valued assfstance that had helped them recover from the profound emotional trauma. However, they also indlcated that longer term services based in a multi-disciplinary setting, a one-stop facility in essence, would have provided them with more sensltive and effMtive assistance at the point of dfsclasure and subsequently.     

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.     

Novel recovery methods for biological materials in cases of alleged sexual assault: A word of caution

Many believe that an increase in the public confidence in the investigation of sexual crimes, and in conviction rates, will lead to an increase in the reporting of these crimes. Consequently, Forensic Science Providers are continually striving to make improvements in evidence recovery and examination and the subsequent interpretation of evidence. One development is in methods that enable an individual to self-sample. However, in cases where a complainant has self-sampled, questions of when the samples were taken, how they were stored and so on, can be legitimately raised. Additionally the continuity and integrity of evidential samples may be questioned resulting in them not being acceptable to the courts and potential evidence could therefore be lost. There is a large emotional and psychological impact of sexual assault and rape and no complainant who reports a sexual assault and recovers material should have that evidence inadmissible to a court. Specialised units for victims of alleged sexual violence are available and offer far more than the recovery of evidential samples. This commentary on behalf of the Faculty of Forensic & Legal Medicine (FFLM) and the Association of Forensic Science Providers Body Fluid Forum (AFSP BFF) highlights the need for after care for the victims of sexual assault and why all evidence recovered in cases of alleged sexual assault and sexual violence should be obtained in line with best practice protocols.     

Factors associated with contact child sexual abuse in a sample of indecent image offenders

Abstract

This study explored a sample of 244 UK adult male offenders convicted of offences involving indecent images of children (IIOC): 120 had a previous contact child sexual offence (defined as dual offenders) and 124 had no evidence of an offence against a child (defined as non-contact offenders). Offender groups were compared regarding their socio-demographic characteristics, previous convictions and IIOC possession. Key discriminatory factors that differentiated dual offenders were: access to children, previous offence history, sexual grooming and possession of IIOC that depicts similar-aged victims. In contrast, non-contact offenders could be identified from their greater amount and wider range of IIOC possession. The results suggest a homology between Internet behaviours, IIOC possession and victim selection. Implications for law enforcement agencies are discussed in terms of assisting investigative prioritisation by identifying those most at risk of committing sexual abuse against children.     

The sexual objectification of girls and aggression towards them in gang and non-gang affiliated youth

Sexual objectification is related to various negative attitudes and outcomes, including rape proclivity and reduced moral concern for the objectified, which suggests that objectification has implications for aggression. Our study examined the relationship between objectification and general aggressive behaviour in adolescents, including gang-affiliated youth. We hypothesized that (1) objectification would correlate with aggression towards girls, (2) gang affiliation would correlate with objectification and aggression towards girls, and (3) objectification and gang affiliation would interact such that strongly affiliated participants who objectified girls would be most aggressive towards them. We also hypothesized that sexual objectification would be a significant predictor of aggression above and beyond other factors, such as trait aggression. As predicted, objectification correlated with aggression towards girls and with gang affiliation, which also correlated with aggression. In addition, objectification predicted aggression towards girls, after controlling for other relevant factors. Further, we found an objectification?×?gang affiliation interaction, which differed from our original predictions. Among participants low in gang affiliation, objectification of girls predicted levels of aggression towards them. Among those high in gang affiliation, however, objectification did not predict aggression. We discussed the implications of our findings for general aggression.     

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.     

Determination of barbiturates in hair samples by using a validated UHPLC-HRMS method: application in investigation of drug-facilitated sexual assault

In recent years,benzodiazepines and benzodiazepine-like drugs are the most common substances associated with drug-facilitated sexual assaults(DFSA);however,barbiturates are also detected occasionally.Segmental hair analysis provides useful information on the historic pattern of drug use,enabling differentiation between single exposure in DFSA cases and chronic use.However,sensitive and specific methods for barbiturate analysis in hair samples are needed.Herein,we present an ultra-high-performance liquid chromatography coupled with high-resolution mass spectrometry(UHPLC-HRMS)method for qualitative and quantitative determination of seven barbiturates in hair samples.Firstly,a hair strand was decontaminated and then freeze-milled in liquid nitrogen.Next,50mg of powdered hair was extracted with methanol in an ultrasonic bath for 10 min in the presence of 10 ng phenobarbital-d5.The supernatant was dried under nitrogen gas,and the pellet was dissolved in 100 μL mobile phase.Afterwards,10 μL of the suspension was injected into the UHPLC-HRMS system.The present method involved two UHPLC conditions for determination of barbiturates(I)and identification of the structural isomers amobarbital and pentobarbital(II).This method showed satisfactory linearity in a range of 0.02–20.00 ng/mg for UHPLC conditions I and II,both with a high determination coefficient(0.9991–0.9999).The selectivity,intra-and interday precision,accuracy and matrix effect of the method were acceptable.Next,the validated method was applied to investigate an authentic DFSA case.Hair samples(black,approximate 25cm long)were collected 3 months after the assault,and the proximal segments(0–5 cm from the root;each segment was 1 cm long)were analysed.Amobarbital was detected at a concentration of相似文献   

Taking the stand: defendant statements in court cases of alleged sexual abuse against infants,toddlers and preschoolers

Investigating and adjudicating allegations of child sexual abuse are challenging tasks. In the present study, we examined defendant statements concerning charges of sexual abuse against young children in Swedish district court cases (87 defendants, 140 child complainants, tried between January 2010 to December 2015). A main objective was to test predictive factors for admissions of guilt using inferential statistical analyses. Furthermore, using qualitative thematical analysis, we sought to identify common patterns in the defendants’ explanations to the allegation. Approximately one-third of the defendants (31%) pleaded guilty during trial. Admissions of guilt were more likely if the defendant was young, if the child was young at the onset of abuse, if the child and perpetrator had an extrafamilial relationship, and if the defendant possessed child pornography. A conflict with the person who made the report (e.g. a custody dispute), a testimony from the child, a direct eyewitness, or an informal disclosure recipient were significantly more common in cases of denials. In the qualitative analysis, a range of alternative explanations behind the abuse allegations were identified. Legal professionals and investigators may benefit from considering these alternative hypotheses during their investigative and judicial work.     

Victim age,attractiveness and,abuse history as factors in the perception of a hypothetical child sexual abuse case

Abstract

This study examines the effect of victim age, victim attractiveness, the victim's abuse history and respondent gender have on attributions of blame and credibility towards a female victim in a hypothetical child sexual abuse case. A total of 397 respondents from a community sample read a hypothetical child sexual abuse (CSA) scenario in which victim age, victim attractiveness and the victim's abuse history were manipulated. Respondents then completed a 16-item blame attribution questionnaire. Several predictions were made. First, a 10-year-old victim would be deemed less blameworthy and more credible than a 15-year-old victim. Secondly, an attractive victim would be viewed more positively, and attributed less blame, than an unattractive victim. Thirdly, a victim with previous history of being sexual abused—either by the same or different perpetrators—would be deemed more culpable for their own CSA than a first time victims. Finally, female respondents were expected to take a more pro-victim and anti-perpetrator stance than males. Whilst comparatively few differences were found across victim attractiveness and abuse history. Overall findings were broadly in line with predictions. It was concluded that victim age and respondent gender play particularly important roles in the attribution of blame towards victims and perpetrators of child sexual abuse.     

Identification and isolation of male cells using fluorescence in situ hybridisation and laser microdissection, for use in the investigation of sexual assault

In cases of sexual assault involving an azoospermic assailant, vaginal swabs taken from the victim may fail to provide an autosomal DNA profile with which to search a suspect database, as the signal from any male cells present would be masked by that from the overwhelming number of female cells collected on the swab. Here, we describe a method of visually identifying diploid male cells in such samples using fluorescence in situ hybridisation, and selectively harvesting them by means of laser microdissection. This combination of techniques was tested on 26 post-coital vaginal swabs taken at a range of times after intercourse; the collected cells were then subjected to a simple lysis procedure and DNA was amplified using the AmpFlSTR^® SGMPlus^® multiplex under low copy number conditions. Useful DNA profiles were generated from samples taken up to 24 h after intercourse.     

Psychiatric disorders and management of sexual offenders in the prison psychiatric consultation unit of Marseille

Since 2017, complaints of sexual violence have increased in France. At the same time, the management of sexual offenders has been at the center of international public health policies. The prevalence of mental disorders among sexual offenders is an essential field of research. There are some published studies on the prevalence of psychiatric disorders in sexual offenders in detention, but there are few recent published studies among French individuals who were detained. Our objectives were to determine the prevalence of psychiatric disorders among persons detained for sexual offenses and the level of care received according to their diagnosis. For this purpose, we carried out a retrospective observational study from January 2017 to October 2021 of all adult sexual offenders, whether accused or convicted, who were seen in the psychiatric consultation unit of Les Baumettes prison, Marseille, France. The primary outcome measure was the psychiatric diagnosis entered in the medical records. One hundred forty-two patients were included in analysis. All patients were men, and the majority (n = 97, 68.3%) of these patients presented with at least one psychiatric disorder, principally a personality disorder (31.7%). 10.6% presented with a schizophrenic disorder, 4.9% a bipolar disorder, 3.5% a depressive disorder, 5.6% pedophilic paraphilia, and 25.4% an addictive disorder. Their management and comorbid addictions were analyzed in subgroups for each psychiatric disorder. Patients appeared to receive an appropriate level of care for their diagnosed disorder. It seems important to develop structured assessment of recidivism risk for better management of sexual offenders.     

Perpetrators of organised child sexual exploitation (CSE) in the UK: a review of current research

ABSTRACT

Researchers and professionals tend to agree that there continues to be a paucity of evidence on who perpetrates organised child sexual exploitation (CSE). This article provides a review of currently available research and data pertaining to this form of offending. It also considers gaps in existing research and some of the challenges surrounding current data recording. Beginning with a discussion of terminology surrounding organised CSE - which has also been called “group localised grooming”, “internal trafficking” and “contact child sex abuse” – there then follows a request for greater clarity of terminology. Finally, the specific issue of offender characteristics is broached through an examination of available research and evidence relating to the perpetrators of organised CSE.