Ballistic impact of hollow-point ammunition on porcine bone

Identifying failure mechanisms in skeletal tissue allows a deeper understanding of the effects of specific projectile impacts on bone. While ballistic trauma in flat bones is largely researched, knowledge of how long bones react to gunshot impacts is limited in the literature. The impacts of deforming ammunition appear to produce higher levels of fragmentation; however, these have not been studied in depth. This study compares the damage to femora bone by HP 0.357 and 9 mm projectiles constructed with both full and semi-metal jackets. Impact experiments were undertaken on a single-stage light gas gun involving the use of a high-speed video camera and full reconstruction of the bones to ascertain fracture patterns occurring in the femora. Higher degrees of fragmentation are likened to the presence of semi-jacketed HP projectiles than jacketed HP projectiles. The observations of external facing beveled edges are believed to be associated with the increased separation of the jacket and lead core of projectiles. Additionally, experimentation has shown that the amount of kinetic energy lost postimpact is likely related to the presence or the absence of a metal jacket on an HP projectile. The observed data, therefore, suggest that the composition, rather than the configuration, of a projectile affects the type and extent of the damage.     

Internal validation of reduced PCR reaction volume of the Qiagen Investigator® Argus X-12 QS Kit from blood samples on FTA cards

The onus of proof in criminal cases is beyond any reasonable doubt, and the issue on the lack of complete internal validation data can be manipulated when it comes to justifying the validity and reliability of the X-chromosomal short tandem repeats analysis for court representation. Therefore, this research evaluated the efficiency of the optimized 60% reduced volumes for polymerase chain reaction (PCR) amplification using the Qiagen Investigator® Argus X-12 QS Kit, as well as the capillary electrophoresis (CE) sample preparation for blood samples on Flinder's Technology Associates (FTA) cards. Good-quality DNA profile (3000–12,000 RFU) from the purified blood sample on FTA card (1.2 mm) were obtained using the optimized PCR (10.0 μL of PCR reaction volume and 21 cycles) and CE (9.0 μL Hi-Di™ Formamide and 0.3 μL DNA Size Standard 550 [BTO] and 27 s injection time) conditions. The analytical and stochastic thresholds were 100 and 200 RFU, respectively. Hence, the internal validation data supported the use of the optimized 60% reduced PCR amplification reaction volume of the Qiagen Investigator® Argus X-12 QS Kit as well as the CE sample preparation for producing reliable DNA profiles that comply with the quality assurance standards for forensic DNA testing laboratories, while optimizing the analytical cost.     

“A Mom First and a Candidate Second”: Gender Differences in Candidates' Self-Presentation of Family

Parenthood carries different consequences for men and women in politics. While the conventional wisdom is that motherhood is a liability for women candidates and fatherhood an asset for men, recent elections have called this idea into question. Specifically, Sarah Palin's candidacy and her cadre of “Mama Grizzlies” suggest that there may be times when motherhood can be an asset. We analyze how men and women present their families to voters by examining the campaign websites of congressional contenders in 2008 and 2010. The results indicate that despite the proliferation of mother candidates, women still tend to de-emphasize their children compared to their male colleagues, who are more likely to showcase their families, most notably in pictures. Moreover, we find that other factors like parental status, age of children, party, chamber, incumbency, and opponent gender also affect differences in candidates' propensity to use their families in campaigns.     

ID‐Check: Online Concealed Information Test Reveals True Identity

The Internet has already changed people's lives considerably and is likely to drastically change forensic research. We developed a web‐based test to reveal concealed autobiographical information. Initial studies identified a number of conditions that affect diagnostic efficiency. By combining these moderators, this study investigated the full potential of the online ID‐check. Participants (n = 101) tried to hide their identity and claimed a false identity in a reaction time‐based Concealed Information Test. Half of the participants were presented with personal details (e.g., first name, last name, birthday), whereas the others only saw irrelevant details. Results showed that participants′ true identity could be detected with high accuracy (AUC = 0.98; overall accuracy: 86–94%). Online memory detection can reliably and validly detect whether someone is hiding their true identity. This suggests that online memory detection might become a valuable tool for forensic applications.     

Labor Market Returns to MBAs From Less-Selective Universities: Evidence From a Field Experiment During COVID-19

Master's degree enrollment and debt have increased substantially in recent years, raising important questions about the labor market value of these credentials. Using a field experiment featuring 9,480 job applications submitted during the early months of the COVID-19 pandemic, I examine employers’ responses to job candidates with a Master of Business Administration (MBA), which represents one-quarter of all master's degrees in the United States. I focus on MBAs from three types of less-selective institutions that collectively enroll the vast majority of master's students: for-profit, online, and regional universities. Despite the substantial time and expense required for these degrees, job candidates with MBAs from all three types of institutions received positive responses from employers at the same rate as candidates who only had a bachelor's degree—even for positions that listed a preference for a master's degree. Additionally, applicants with names suggesting they were Black men received 30 percent fewer positive responses than otherwise equivalent applicants whose names suggested they were White men or women, providing further evidence of racial discrimination in hiring practices.     

Describing intimate partner stalking over time: an effort to inform victim-centered service provision

Stalking has increasingly been the subject of legislation and research in the past 20 years. Within intimate partner violence, the context where it is most likely to occur, stalking predicts both greater danger and greater distress for the victim. However, research shows that practitioners are often unsure how to address stalking, and that the remedies available may not be effective. This longitudinal exploration of stalking focused on the experience of victims of intimate partner stalking and was conducted by Safe Horizon, an organization providing assistance to victims of violence and abuse in New York City. The sample of 82 women was interviewed monthly over 7 months, and the data were analyzed using growth curve models. We found that stalking decreased over time at a marginally significant level, and that change in stalking varied among participants. Perceived safety followed a similar pattern, increasing but not significantly, while stalking-related distress decreased significantly. The slopes of these variables were correlated, such that as stalking frequency decreased, perceived safety increased and distress decreased. Help-seeking was greater from court sources than victim services over the course of the study, but neither help source was related to a significant decrease in the stalking trajectory. According to victim report, orders of protection (OP) were helpful at some points and not at others. Implications of these results for offering victim-centered services are discussed.     

Development and Predictive Ability of a Behavior-Based Typology of Men Who Batter

This study explores the existence and predictive ability of a behavior-based typology of men who were adjudicated for a domestic violence crime in an urban criminal justice system. Data from 671 men who completed a 2-hour biopsychosocial assessment were analyzed using cluster analysis. Findings indicate a typology of low level criminality (25.6%), dysphoric volatile behavior (42.2%), and dysphoric general violence (32.2%) similar to previous typologies, but with some unique characteristics. The behavior-based typology predicted both program completion and subsequent rearrest. This study provides preliminary support for the development of typological assessment in criminal justice and BIP settings for early identification of men who may need additional interventions.     

Truancy Intervention Reduces Crime: Results from a Randomized Field Trial

Educational attainment is a fundamental cornerstone to success throughout the life-course. As a result, ensuring that young people remain in school and are not truant is critical. Although the importance of truancy as a risk factor for many adverse outcomes, including crime, has been well-documented, much less methodologically rigorous work has been undertaken to evaluate potentially promising prevention and intervention strategies. This paper uses a randomized field trial method to test how a partnership between police and schools targeting truancy impacts offending in a sample of high-risk truanting young people. We find that the truancy intervention reduces offending and we discuss the implications for practice and directions for future research.