Investigation into "normal" background DNA on adult necks: implications for DNA profiling of manual strangulation victims

Others have investigated the role that DNA profiling could play as a method for identifying the perpetrator of manual strangulation. These studies have demonstrated that it is possible to collect offender DNA from the skin surface of a victim following physical contact. It is not known whether nonself biological material is normally present on the skin surface due to adventitious transfer occurring during innocent everyday interactions. To test the hypothesis that detectable amounts of nonself DNA are normally present on the skin surface of healthy adult individuals due to the adventitious transfer of DNA occurring during normal day-to-day social interactions, we designed an experiment in three phases. Phase 1 was used to deduce which DNA collection, extraction, and amplification methods were suited to investigating this question. During phase 2, the neck surface of 24 healthy adult volunteers was swabbed. DNA was extracted using the QIAamp DNA mini kit and amplified using the SGM Plus PCR amplification kit, using 28 PCR cycles. The work carried out during phase 3 involved a simulated assault to investigate primary and secondary transfer of DNA during physical contact. It was found that 23% of neck areas swabbed during phase 2 of this investigation showed nondonor alleles in the resulting DNA profile, with 5% of areas showing six or more nondonor alleles. The results of phase 3 showed that primary, secondary, and zero transfer of victim and/or offender DNA could be observed after physical contact and that alleles from an unknown source could still be detected in this more controlled experiment. The data presented in this paper demonstrate that DNA profiles generated after swabbing the skin surface of healthy adults can include components of an unknown source, present due to adventitious transfer. These components, if present in large quantities, have the potential to interfere with DNA profile interpretation of swabs taken for the investigation of physical assault by DNA profiling.     

Police–victim engagement in building a victim empowerment approach to intimate partner violence cases

Intimate partner violence (IPV) has been highlighted as a priority for UK governments and criminal justice agencies since the 1990s. However, whilst generating significant policy and procedural responses, the overall impact continues to be criticised. This paper examines contemporary approaches to IPV identification and response, highlighting the limitations within victim engagement and empowerment. It then moves on to specific developments and theories in victimology, demonstrating how research into victim engagement is emerging and could be utilised in practice to enhance victim empowerment. It argues that policy and procedure based upon an enhanced victim empowerment approach would be necessary in striving for positive criminal justice outcomes and for increasing victim satisfaction.     

Emotional Distress,Drinking, and Academic Achievement Across the Adolescent Life Course

Our study of the adolescent life course proposes that substantial maturation occurs within three intertwined arenas of development: the social, the psychological, and the normative attainment. Further, each arena may be linked, respectively, to three youth problem dimensions: drinking, depressive affect, and academic achievement. We use latent growth curves and the Youth Development Study (effective N = 856) to track a panel of teens from their freshman to senior year in high school. There are 54.4% girls and 45.6% boys, and 75.7% non-Hispanic whites and 24.3% other races/ethnicities. Two research goals are addressed: (1) estimate each dimension’s unique developmental trajectory across high school, and (2) model the dimensions together in order to assess their reciprocal influences. While mean levels in all three dimensions increased over time, distinct developmental patterns were observed, especially in drinking and depression. For example, more drinking occasions—a social activity for most teens—may help assuage some teens’ emotional distress, especially girls’. These patterns suggest a synergistic relationship between the social and psychological arenas of development. Contrary to expectation, higher freshman depressive affect was associated with a significantly sharper increase in GPA over time for girls.

Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teeth

Isotopic signatures used in the georeferencing of human remains are largely fixed by spatially distinct geologic and environmental processes. However, location-dependent temporal changes in these isotope ratios should also be considered when determining an individual’s provenance and/or trajectory. Distributions of the relevant isotopes can be impacted by predictable external factors such as climate change, delocalisation of food and water sources and changes in sources and uses of metals. Using Multi-Collector Inductively-Coupled Plasma Mass Spectrometer (MC-ICP-MS) analyses of ²⁰⁶Pb/²⁰⁷Pb in tooth enamel and dentin from a population of 21 ± 1-year-old individuals born circa 1984 and isotope ratio mass spectrometry (IRMS) of δ¹⁸O in their enamel, we examined the expected influence of some of these factors. The resulting adjustments to the geographic distribution of isotope ratios (isoscapes) found in tooth enamel and dentin may contain additional useful information for forensic identification, but the shifts in values can also impact the uncertainty and usefulness of identifications if they are not taken into account.

KEY POINTS

• Isoscapes of ²⁰⁶Pb/²⁰⁷Pb and δ¹⁸O used for geolocation are not static.
• Within a few years, the enamel and dentin of a person may exhibit measurable differences in ²⁰⁶Pb/²⁰⁷Pb even without changing locations.
• Changes in climatic patterns tied to rising temperatures are more significant than the direct effect of increasing temperature on δ¹⁸O fixed in tooth bioapatite.
• Third molar (M3) enamel mineralisation includes material incorporated from before formal amelogenesis takes place.

     

The Common Ground of Law and Anarchism

Liverpool Law Review - Anarchism often sets itself against the law. However, the alternative vision advanced by anarchism faces theoretical problems. Further, case studies of anarchist communities...     

The Right to Have Rights as a Right to Enter: Addressing a Lacuna in the International Refugee Protection Regime

This paper draws upon Hannah Arendt's idea of the 'right to have rights' to critique the current protection gap faced by refugees today. While refugees are protected from refoulement once they make it to the jurisdiction or territory of a state, they face an ever-increasing array of non-entrée policies designed to stymie access to state territory. Without being able to enter a state capable of securing their claims to safety and dignity, refugees cannot achieve the rights which ought to be afforded to them under international law. Drawing upon both legal theory and political philosophy, this paper argues that refugees today, just as the stateless in Arendt’s time, must be afforded the ‘right to have rights’, understood as a right to enter state territory.     

Vote-seeking incentives and investment environments: The need for credit claiming and the provision of protectionism

Incentives to cultivate a personal reputation encourage legislators to generate policy outcomes for which they can claim credit. We show that these incentives make themselves felt in international agreements – a domain that might typically be considered within the purview of the executive branch. Through a cross-national analysis and brief case studies, we show that countries with electoral systems that encourage personal vote seeking are more likely to negotiate exceptions to treaties meant to liberalize their investment environments. Legislators benefit by being able to claim credit for having protected their constituents from the competition an unrestricted agreement would entail.     

Sexuality Related Social Support Among Lesbian, Gay, and Bisexual Youth

Lesbian, gay, and bisexual (“LGB”) youth may face significant stressors related to their sexual orientation. Few studies, however, have examined youth’s experiences of support for coping with these stressors. The current study compared LGB youth’s perceptions of support for sexuality stress to their support for other types of problems. The links between sexuality stress, sexuality support, and emotional distress were also examined. Ninety-eight LGB youth (ages 18–21, 33% female) rated support from family, heterosexual friends, and sexual minority friends for dealing with problems related, and not related, to their sexuality. From family and heterosexual friends, support for sexuality stress was less available than support for other stressors. Sexual minority friends provided the highest levels of sexuality support. In regression analyses, higher levels of sexuality support related to decreased emotional distress and buffered against the negative effects of sexuality stress on emotional distress. Sexuality support, although less available than other types of support, may be especially relevant to mental health among LGB youth.     

War and Peace in International Relations Theory: A Classroom Simulation

Simulations are increasingly common pedagogical tools in political science and international relations courses. This article develops a classroom simulation that aims to facilitate students’ theoretical understanding of the topic of war and peace in international relations, and accomplishes this by incorporating important theoretical concepts about the causes of war found in international relations theory into the design and implementation of the simulation. In addition to sharing a successful classroom simulation with other international relations instructors, the article makes two important contributions to the pedagogical literature on simulations. First, it shows how simulation design can be usefully based on the theoretical concepts and/or substantive problems that course instructors aim to impart to their students. Second, it demonstrates that it is possible to achieve important learning objectives with low-intensity simulations that do not require a big investment of time, energy, and resources.