Biomechanics of knife stab attacks

In the past it has been assumed that the fingerprints of women tend to have "fine" epidermal ridge detail while men have "coarse" ridge detail. Past studies have examined this hypothesis but have not clearly demonstrated if observed differences are statistically significant. The goal of this study is to determine if women have significantly higher ridge density, hence finer epidermal ridge detail, than men by counting ridges that occur within a well defined space. If significant gender differences do exist then the likelihood of inferring gender from given ridge densities will be explored. This study focused on 400 randomly picked ten-print cards representing 400 subjects. The demographic composition of this sample population represents 100 Caucasian males, 100 African American males, 100 Caucasian females and 100 African American females all within the age range of 18-67. Results show that women tend to have a significantly higher ridge density than men and that this trend is upheld in subjects of both Caucasian and African American descent (F = 81.96, P < 0.001). Application of Bayes' theorem suggests that a given fingerprint possessing a ridge density of 11 ridges/25 mm2 or less is most likely to be of male origin. Likewise a fingerprint having a ridge density of 12 ridges/25 mm2 or greater is most likely to be of female origin, regardless of race.     

利用腭皱特征进行同一认定的指标体系构建

目的根据腭皱的形态图特征,进行口腔腭皱在法医学同一认定的指标体系构建。方法收集100例成年人腭皱模型,依据腭皱的形状、数量、位置分布等特征对腭皱形态图进行全面系统的编码。编码顺序采用英文字母按照先右侧再左侧,先前部再后部的顺序编码,并且右、左侧编码以破折号连接。最后依据编码,统计分析腭皱形态分布特征。结果 100例腭皱形态图中,个体间未见完全一致者,每个个体不论男性与女性均表现有独特的腭皱形态图;且同一个体左右侧单条腭皱的形态及分布亦不同。波浪形腭皱所占比例最大（23.03%）,三分叉形出现比例最小（0.74%）,不同性别的波浪形及曲线形腭皱所占比例均较大,女性波浪形（22.7%）及曲线形（18.28%）;男性波浪形（24.11%）及曲线形（21.43%）。结论口腔腭皱法医学同一认定的指标体系构建,将为法医学的同一认定提供一种新的方法。     

A Comparison of Palmar Dermatoglyphics in Two Ethnic Indian Populations of North Bengal,India*

Abstract: Dermatoglyphic print comparisons can be utilized to establish personal identification in forensic cases. The northern part of the state of West Bengal, India, is the home to many ethnic populations. Two such populations are the Rajbanshi and the Mech. Palm prints were collected from 192 adult Rajbanshi (105 men and 87 women) and 100 adult Mech (50 men and 50 women) individuals for print comparison using the standard ink and roll print method. The dermatoglyphic variables studied were mainline formulae, termination of mainline, positional variation of axial triradii, and true pattern of hypothenar and thenar configuration area. There were differences between the Rajbanshi and Mech individuals with respect to these dermatoglyphic variables. The uses of these variables appear to be limited only to ethnic identification, not personal identification. The present investigation further highlights the racial affinity, sex, and bilateral differences among Rajbanshi individuals using dermatoglyphic palmar variables.     

Frequencies of morphological characteristics in two contemporary forensic collections: implications for identification

Positive identification relies on comparison of antemortem and postmortem data. Some identifications are based on morphological features such as fracture, pathological condition, and surgical hardware, despite little literature indicating the frequencies of such traits. This study examines whether such features are sufficiently rare as to be deemed individualizing. Data were collected on two modern North American skeletal collections (N=482 individuals). Presence/absence of features was scored by skeletal element and side. Results indicate that frequencies vary by geographic region (higher frequency of fractures and pathological conditions in New Mexico while individuals in Tennessee were more likely to have surgical interventions), many features such as fractures are remarkably common and that even suites of traits may not be individualizing. Caution is warranted when using written data rather than radiographic comparisons as the primary source of identification. The implications of these findings to missing person databases are also discussed.     

A NEW LOOK AT THE EMPLOYMENT AND RECIDIVISM RELATIONSHIP THROUGH THE LENS OF A CRIMINAL BACKGROUND CHECK*

Criminal background checks are increasingly being incorporated into hiring decisions by employers. Although originally uncompromising—almost anyone with a criminal record could be denied employment—court rulings and policy changes have forced criminal background checks to become more nuanced. One motivation for allowing more individuals with criminal records to work is to decrease recidivism and encourage desistance. In this article, we estimate the causal impact of receiving a clearance to work on subsequent arrests for individuals with criminal records who have been provisionally hired to work in certain nonlicensed health‐care jobs in New York State (N = 6,648). We employ an instrumental variable approach based on a substantive understanding of the state‐mandated criminal background check process. We examine age‐graded effects within this group of motivated individuals and differential effects by sex in the rapidly growing health‐care industry, which is typically dominated by women. Our estimated local average treatment effect indicates a 2.2‐percentage‐point decrease in the likelihood of a subsequent arrest in 1 year and a 4.2‐percentage‐point decrease over 3 years. We find meaningful variations by sex; men are 8.4 percentage points less likely to be arrested over the 3‐year period when cleared compared with a 2.4‐percentage‐point (and nonsignificant) effect for women. Older women in particular are driving the nonsignificant results for women.     

Comparing Women and Men Arrested for Domestic Violence: A Preliminary Report

This study uses criminal justice data to compare women and men arrested for domestic violence on their levels of violence, reported victimization, general criminality, and substance abuse. Participants were 45 women and 45 men convicted of domestic violence between 1996 and 1998. Results indicate that women were less likely than men to have a history of domestic violence offenses and nonviolent crimes. They were also more likely to report that they had been injured or victimized by their partner at the time of their arrest. However, in other ways, women and men were similar: they were equally likely to have used severe violence and inflicted severe injuries on their victims; to have previously committed violence against nonintimates; and to have been using drugs or alcohol at the time of their arrest. The implications for treatment for women arrested for domestic violence are discussed.     

A forensic international market survey of condom lubricants and personal hygiene products using ATR-FTIR coupled to chemometrics

Condom residues may be encountered in forensic investigations as traces in sexual assault or rape cases. Casework studies have shown the value of distinguishing condom residues from other types of personal products used by women. However, up to now, there has been no investigation of their chemical variability within an international context. This work employed attenuated total reflectance Fourier transform infrared spectroscopy with chemometrics to provide objective characterisation of condom lubricants and personal hygiene products from the international market. 166 samples were obtained covering five major classes of products likely to be used by women. Principal component analysis distinguished most major classes based on their spectral profiles, with subsequent support vector machine models yielding discrimination accuracies over 90%. A two-step approach was subsequently developed and enabled both classification and a discrimination accuracy of 100%. This could provide greater confidence in chemical discrimination of residues from these products when conducting investigations and help assess the origin of the chemical profile obtained. Further testing using three validation sets produced an identification accuracy of 100% for generic classes, which may allow investigative leads to be more readily obtained from recovered evidence.     

When men fight with women (versus other men): Limited offending during disputes

What transpires in a dispute, even a violent dispute, is affected by the tendency for adversaries to engage in “limited offending.” We focus on one restraint: the tendency of men to limit their aggression in their disputes with women. Analyses are based on an incident-level survey about interpersonal disputes administered to 503 men who are incarcerated and 220 men who had never been incarcerated. Using multinomial and logistic regression models, we examined the extent to which an adversary's gender predicted dispute-related behaviors. The evidence suggests that the chivalry norm has pervasive effects on the behavior of men during their disputes with women. Men are more likely to engage in remedial actions (e.g., apologies) when their adversary is a woman, as opposed to another man. In addition, men are less likely to make violent threats and engage in physical attacks when their adversary is a woman, even after they have themselves been physically attacked. When men are violent, they are less likely to injure a woman than a man. However, the chivalry norm does not inhibit verbal aggression in these disputes: men are just as likely to engage in verbal attacks and nonviolent threats when the adversary is a woman.     

Women Corrections Officers in Men's Prisons

ABSTRACT

Women have worked as corrections officers (COs) in some adult male prisons in most states for the past two decades. However, the degree of acceptance of women COs and the perception of women officers' job performance by men officers have varied greatly. This study was based on the results of a survey of men and women officers working in men's prisons in a midwestern state. Comparisons of the officers' responses about women's acceptance, safety, and perceived job performance revealed some significant gender differences. The results indicated that while women faced some resistance among men officers, it was not to the extent suggested by previous research studies, and the resistance came primarily from more experienced men officers. Women officers were confident of their ability to work effectively in men's prisons. The resistance to women that persists among some men officers is likely to provide an obstacle for women seeking opportunities for advancement and promotion in adult male prisons.     

Predicting the timing of women's departure from abusive relationships

The aim of this study was to investigate forces that affect the timing of women's exit from violent relationships with men. Abused women were recruited from posters in the community and battered women's shelters, interviewed, and followed up for 10 years. Data for this study are based on 100 women and were analyzed using event history analysis. Age, ethnicity, and alcohol consumption levels of both partners predicted the timing of women's termination of abusive relationships. An interaction effect showed that women who scored above the mean on an index of physical aggression and who never used shelter services had the longest trajectories of violence exposure; severely abused women without shelter use were more likely to stay. Our findings indicate that women who receive shelter services endure shorter periods of violence than women who do not access such services. Further outreach, especially to women experiencing high rates of physical aggression, is recommended.     

Mental Disorder, Violence, and Gender

Recent studies have reported comparable rates of violence among men and women with mental disorder, raising important issues for clinical risk assessment. This study examines the relationship between gender and violence using data from the MacArthur Violence Risk Assessment Study. Patients in acute psychiatric wards were interviewed 5 times over the year following their discharge to the community. Results showed some differences between men and women in the violence committed immediately following discharge, with rates for men being higher. But the prevalence of violence over the 1 year was similar for female and male discharged patients. However, there were substantial gender differences in the situational context of the violence committed. Men were more likely to have been drinking or using street drugs, and less likely to have been adhering to prescribed psychotropic medication, prior to committing violence. The violence committed by men was more likely to result in serious injury than the violence committed by women, and men were more likely than women to be arrested after committing a violent act. Women were more likely to target family members and to be violent in the home.     

Outcome of sex determination from ulnar and radial ridge densities of Brazilians’ fingerprints: Applying an existing method to a new population

Fingerprints do not repeat, varying from region to region on the same fingerprint and from person to person. Using this morphological exclusivity in the individualization of people is considered one of the most reliable methods of identification worldwide. Many populations have been studied with respect to sex determination from fingerprints. In this study, the ridge density from two different areas - ulnar and radial - of the ten fingerprints from 100 Brazilian men and 100 Brazilian women was ascertained and statistically analyzed. The aim was to check whether these characteristics depended on sex to distinguish them categorically. Women had significantly higher ridge density in both areas for the fingers analyzed globally. Sometimes, men and women showed statistically significant differences in hands and fingers. From ulnar and radial ridge densities, this research developed thresholds for sexual discrimination cases of human identification in Brazil.     

Identification Using Frontal Sinus by Three‐Dimensional Reconstruction from Computed Tomography*

Abstract: Radiographs and computed tomography (CT) images have been increasingly applied and accepted in forensic sciences. Along with radiographs and CT images, the frontal sinus is often used for the individual identification because of its unique and unchangeable characteristics. The purpose of this study is to define the usefulness of three‐dimensional (3‐D) images of the frontal sinus for identification. CT images from 119 Korean cadavers were built up for 3‐D reconstruction and surveyed with 15 measurements. The total volume of the sinus, some nonmetric characteristics, and the bilateral asymmetry index in men differed significantly from those in women (p < 0.05). The digit codes, six sections and 10‐digit number, were almost able to accurately identify individuals (98%). This study showed a statistical difference between the sexes and classified the fused and prominent middle sinuses for the first time. This proposed method for identification is more accurate than those used in other studies.     

Species identification of some common necrophagous flies in Guangdong province, southern China based on the rDNA internal transcribed spacer 2 (ITS2)

Despite the fact that the differences in epidermal ridge density between men and women have been accepted for some time, they have only been thoroughly demonstrated in a small number of populations. The aim of this study is to determine whether such differences exist in a sample of the Spanish population by counting epidermal ridges within three well-defined fingerprint areas. If significant gender differences do exist, then the likelihood of inferring gender from given ridge densities will be explored. The data used in this study was obtained from all 10 fingerprints of 200 individuals of the Spanish Caucasian population (100 males and 100 females) between the ages of 20 and 30. Results show that women tend to have a significantly higher ridge density than men in the distal region of all 10 fingers (radial and ulnar count areas), but not in the proximal region (lower count area). The application of Bayes' theorem, assuming that prior probabilities known for each sex, indicate a threshold for discrimination of sexes.     

THE LABELING OF CONVICTED FELONS AND ITS CONSEQUENCES FOR RECIDIVISM*

Florida law allows judges to withhold adjudication of guilt for individuals who have been found guilty of a felony and are being sentenced to probation. Such individuals lose no civil rights and may lawfully assert they had not been convicted of a felony. Labeling theory would predict that the receipt of a felony label could increase the likelihood of recidivism. Reconviction data for 95,919 men and women who were either adjudicated or had adjudication withheld show that those formally labeled are significantly more likely to recidivate in 2 years than those who are not. Labeling effects are stronger for women, whites, and those who reach the age of 30 years without a prior conviction. Second‐level indicators of county characteristics (e.g., crime rates or concentrated disadvantage) have no significant effect on the adjudication/recidivism relationship.     

Patterns of physical and sexual abuse for men and women in dating relationships: A descriptive analysis

A random sample of students at a large Midwestern University was selected in order to examine whether and how physical and sexual abuse were related to each other for men and women, whether abuse in one relationship was independent of abuse in other relationships, and how victims responded to abusive incidents. The results revealed several important patterns. When comparing the frequency of physical and sexual abuse for men and women, it was found that sexual abuse was more common than physical abuse, but only for women. Additionally, women experienced more sexual abuse than men. While men and women did not experience physical abuse in other relationships at more than chance levels, women who sustained sexual abuse in one relationship were more likely to sustain sexual abuse in other relationships. Furthermore, while sustaining physical and sexual abuse were not associated with one another for men, there was a weak association for women. Finally, victims of abuse were more likely to tell their friends they had been abused than report it to criminal justice authorities.Paper presented at the 1987 American Society of Criminology Meetings.     

The role of respondent gender and sexual orientation in shaping punitive attitudes and perceptions of responsibility for same- and opposite-sex student-teacher relationships

ABSTRACT

The sexual double standard posits that men and women are perceived differently for their sexual experiences, including experiences of sexual violence and misconduct. This study explores these gendered perceptions for situations involving teacher-student sexual contact where the student is a minor. A quasi-experimental vignette design (n?=?648 respondents), where the gender of the teacher and student, is used to explore how both same and opposite sex teacher-student gender dyads shape perceptions of the teacher and student, including responsibility, positive outcomes for the student, and punitive attitudes. We found that men are less likely to hold the teacher responsible and more likely to indicate positive student outcomes while women are more punitive toward the teacher. Respondent sexual orientation largely did not influence perceptions. We situate these findings in the literature on child sexual abuse involving authority figures and the implications for theory are discussed.     

Filicide: A Comparison by Sex and Presence or Absence of Self-destructive Behavior

The purpose of this study was to identify sociodemographic, contextual, situational, and individual variables, as well as certain behavioral warning signs, associated with filicide as a function of sex of the agressors and the presence or absence of self-destructive behaviours. The data cover all officially registered filicides committed in Quebec from January 1, 1986, to March 31, 1994, against youths under the age of 18 years. For the group of individuals who have self-destructive behaviours, results indicate that men compared to women are more likely to commit spousal homicide, to kill a higher number of victims, to be going through a conjugal separation, to have committed conjugal violence, to have threatened suicide, and to have threatened to kill their spouse. For the group of individuals who commit no self-destructive acts, women are more likely to present with a depressive disorder, whereas men are more likely to maltreated their children. Men who do not commit a self-destructive act are characterized by a significantly higher likelihood of maltreatment against their children and of tyrannical discipline, whereas men who commit a self-destructive act perpetrate filicide as a means of reprisal against their spouse. Results underscore the importance of considering the different groups of individuals who commit filicide as a function of sex as well as presence or absence of self-destructive behaviour.

Youth alcohol use and dating abuse victimization and perpetration: a test of the relationships at the daily level in a sample of pediatric emergency department patients who use alcohol

Objective: This study retrospectively examined the daily-level associations between youth alcohol use and dating abuse (DA) victimization and perpetration for a 6-month period. Method: Timeline Followback (TLFB) interview data were collected from 397 urban emergency department patients, ages 17 to 21 years. Patients were eligible if they reported past month alcohol use and past year dating. Generalized estimating equation (GEE) analyses estimated the likelihood of DA on a given day as a function of alcohol use or heavy use (≥4 drinks per day for women, ≥5 drinks per day for men), as compared with nonuse. Results: Approximately 52% of men and 61% of women participants reported experiencing DA victimization ≥1 times during the past 6 months, and 45% of men and 55% of women reported perpetrating DA ≥1 times. For both men and women, DA perpetration was more likely on a drinking day as opposed to a nondrinking day (ORs = 1.70 and ORs = 1.69, respectively). DA victimization was also more likely on a drinking day as opposed to a nondrinking day for both men and women (ORs = 1.23 and ORs = 1.34, respectively). DA perpetration and DA victimization were both more likely on heavy drinking days as opposed to nondrinking days (2.04 and 2.03 for men's and women's perpetration, respectively, and 1.41 and 1.43 for men's and women's victimization, respectively). Conclusions: This study found that alcohol use was associated with increased risk for same day DA perpetration and victimization, for both male and female youth. We conclude that for youth who use alcohol, alcohol use is a potential risk factor for DA victimization and perpetration.