Collecting touch DNA from glass surfaces using different sampling solutions and volumes: Immediate and storage effects on genetic STR analysis

Touch DNA has become increasingly important evidence in todays' forensic casework. However, due to its invisible nature and typically minute amounts of DNA, the collection of biological material from touched objects remains a particular challenge that underscores the importance of the best collection methods for maximum recovery efficiency. So far, swabs moistened with water are often utilized in forensic crime scene investigations for touch DNA sampling, even though an aqueous solution provokes osmosis, endangering the cell's integrity. The aim of the research presented here was to systematically determine whether DNA recovery from touched glass items can be significantly increased by varying swabbing solutions and volumes compared with water-moistened swabs and dry swabbing. A second objective was to investigate the possible effects of storage of swab solutions prior to genetic analysis on DNA yield and profile quality when stored for 3 and 12 months, as is often the case with crime scene samples. Overall, the results indicate that adapting volumes of the sampling solutions had no significant effect on DNA yield, while the detergent-based solutions performed better than water and dry removal, with the SDS reagent yielding statistically significant results. Further, stored samples showed an increase in degradation indices for all solutions tested, but no deterioration in DNA content and profile quality, allowing for unrestricted processing of touch DNA samples stored for at least 12 months. One further finding was a strong intraindividual change in DNA amounts observed over the 23 deposition days which may be related to the donor's menstrual cycle.     

There’s no place like home: Explaining international NGO advocacy

INGO advocacy can range from cooperative to confrontational, and these tactical choices can have important repercussions for the overall success of the organization??s policy work, yet little attention has been paid to this variation. We contend that INGO advocacy strategies are shaped by the organization??s national origin. Drawing on insights from sociology and political science, we argue that there is substantial variation among wealthy industrialized democracies in the availability and structure of material resources as well as the domestic institutional environment surrounding INGO work. Together, these national-level factors shape INGOs?? choice of the level of confrontation or conciliation that they adopt in their advocacy. We first demonstrate the importance of INGO national origin using new data on the confrontational advocacy strategies of over 3000 non-governmental organizations from OECD countries that are international in focus. We then explore the relationship between national origin and INGO practice through comparative case studies of INGO umbrella organizations in the relief and development sector. Throughout, we focus on four countries in particular: the United States, Britain, France, and Japan. These countries differ significantly in terms of the material resources and institutional environments faced by INGOs and thus allow us to understand whether and how these factors influence INGO advocacy choices. These systematic differences in INGO strategies have important ramifications for understanding national and global advocacy by INGOs and demonstrate an enduring role of the state in shaping the behavior of non-state actors.     

A Field Experiment on the Effects of Ethnicity and Socioeconomic Status on the Quality of Representation

The principle of equal representation is the cornerstone of modern democracy, yet there have been concerns that the benefits of representation can be skewed, advantaging some over others. We argue that elected officials will be more responsive to constituents whom they perceive as more like themselves and more likely to be politically active. We examine inequalities in representation in a parliamentary democracy where, intrinsic to the institutional framework, there is a long‐standing reputation for serving constituent needs: the United Kingdom. We also advance the literature by focusing on the expediency of responsiveness and the helpfulness of response. Drawing on a field experiment, we find both an overall high level of responsiveness and helpfulness but also biases affecting MP's responsiveness. Our findings raise important questions about equal access to representation, even in a political system where constituency service is the norm and expectation.     

Where did it all go wrong? Implementation failure—and more—in a field experiment of procedural justice policing

Objectives

This paper presents the findings from a retrospective qualitative process evaluation to the Scottish Community Engagement Trial (ScotCET). The study explores the unanticipated results of a randomized field trial testing the effect of ‘procedurally just’ modes of road policing on public perceptions of police. The ScotCET intervention failed to produce the hypothesized results, producing instead significant, and unexplained, negative effects on key aspects of public perception. The present study seeks to examine, from the perspectives of officers implementing the experiment, what the impacts (intended or otherwise) of participation were.

Methods

Group interviews were held within the ScotCET experiment ‘units’ to explore how officers had collectively interpreted and framed ScotCET, and responded as a group to its requirements/demands. Nine groups were held over a 5-month period post experiment completion.

Results

Findings indicate that communication breakdowns during the ScotCET implementation led to misunderstandings of its aims and objectives, and of the requirements placed on officers. Within the context of organizational reform and perceived organizational ‘injustice’, commonly cited aspects of police culture were invoked to facilitate non-compliance with aspects of the experimental intervention, leading to implementation failures, and, possibly, a diffuse negative effect on the attitudes and behaviors of experiment officers.

Conclusions

Organizational structures and processes, and coercive top-down direction, are insufficient to ensure successful implementation of policing research, and, by implication, policing reforms, particularly those that demand alternative ways of ‘doing’ policing and ‘seeing’ citizens. Greater investment in organizational justice and encouraging openness to evidence-led knowledge is needed to promote change.

     

Not separate but equal? The impact of multiple-defendant trials on juror decision-making

Suspects accused of involvement in the same crime can be tried in one multiple-defendant trial. While research has long demonstrated the difficulties of being a juror, no published work has examined whether multiple-defendant trials compound these difficulties. The current research recruited both student and community samples to determine whether trying multiple defendants would increase conviction rates for individual defendants. Every participant watched one of three trial videos – a single defendant against whom the State had a strong case (single-strong), a single-defendant against whom the State had a weak case (single-weak), or a multiple-defendant trial combining both defendants (multiple-defendant). The findings demonstrated an overshare effect – when the defendants were tried together, overall conviction rates for both defendants increased relative to when they were tried alone, though the pattern of results differed by study sample. Although we are unable to provide a definitive mechanism underlying the results, the best explanation seems to be that multiple-defendant trials prompt jurors to engage in a joint evaluation of the defendants, rather than single evaluations of each. Consequently, participant-jurors’ perceptions of each defendant are impacted by how they compare with one another. Thus, the current research casts some doubt on the fairness of multiple-defendant trials.     

Impact of Pain on Cognitive Function in Forensic Neuropsychology Context

Chronic pain is a biopsychosocial condition with a complex neuroscientific and neuropsychological literature. Common types of pain that are seen in the medicolegal context include headaches and musculoskeletal and neuropathic pain, all of which are known to affect neuropsychological test results. Differentiating between the cognitive impact of pain and the effects of traumatic brain injury and other factors, such as emotional distress or fatigue, is often challenging, especially in forensic determinations. Cutting through the polarization of forensic examiners’ opinions on the significance and nature of chronic pain impact on neuropsychological function with research evidence can make neuropsychological assessments more objective and defensible in court. This review focuses on surveying and integrating the available vast empirical evidence from neuroscience and neuropsychology regarding the cognitive impact of chronic pain. Our critical review will emphasize the implications of the new evidence for the forensic assessment determinations regarding causality, diagnosis, impact on function, and prognosis and treatment. To this end, electronic search engines, including PubMed, PsycINFO, and Google Scholar (up to January 2018), have been screened and reviewed both for the neuroscience and neuropsychological literature related to chronic pain, and subsequently updated for content and referencing.     

The Child in European Human Rights Law

This article examines the category of ‘the child’ in European human rights law, based on an analysis of the child‐related jurisprudence of the European Court of Human Rights. It argues that a full account of legal selfhood is constructed through the notion of ‘the child’ in this jurisprudence. The two notions – of ‘the child’ and ‘the self’ – are, from the outset, mutually dependent. The conceptualisation of ‘the child’ in human rights law is underpinned by an account of the self as originating in another and childhood is cast as enabling self‐understanding by making possible the formation of a narrative about the self. The vision of ‘the self’ that emerges is one of ‘the narrative self’, and I assess the implications of this both for the idea of childhood in which this narrative originates and for the vision of the human condition that is expressed in European human rights law more broadly.     

A comparison of plastic cable ties based on physical,chemical and stable isotopic measurements

Plastic cable ties can be utilised in a range of serious criminal activities and a comparison of cable ties, or fragments, may form part of the physical evidence presented to a Court of law. This research assessed the potential value of evidence based on the analysis of plastic cable ties. Twenty packets of black coloured plastic cable ties (nominally 200 mm × 4.8 mm) were purchased in pack sizes ranging from 25 to 100 individual cable ties (Brisbane, Australia, March 2015). Representative samples from each packet were visually examined, compared and tested to determine their physical dimensions, chemical compositions and stable isotopic compositions (δ²H, δ¹³C and δ¹⁵N).All of the individual cable ties from a given packet were found to be indistinguishable with respect to appearance, physical, chemical and isotopic measurements (within-batch variability). Individual cable ties were also found to be isotopically homogeneous with respect to hydrogen, carbon and nitrogen. All of the cable ties analysed were found to have very similar chemical compositions and to be manufactured predominantly from nylon 6,6. The elemental compositions of composite samples, prepared from each packet, were found to be highly variable and, as such, were of very limited value.Cable ties from ten of the twenty packets were uniquely characterised by physical appearance (between-batch variability). Physical measurements such as the width, thickness and tooth-count of the grip section did not provide additional discrimination. Cable ties from nineteen of the twenty packets were uniquely characterised by isotopic composition, based on δ²H and δ¹⁵N measurements. Samples from two packets of Crescent brand cable ties were found to be indistinguishable with respect to all of the tests applied in this study. These two packets were inadvertently purchased from the same retailer and had the same barcode and batch number. It was considered a reasonable assumption that these two packets originated from the same manufacturing batch.The authors reason that a likelihood ratio (that might be presented to a Court of law) can be derived from this type of discrete data based on a calculation of the possible combinations of distinguishable objects (unordered sampling with replacement) in a convenience sample collected from the background population. In this example, a database of 19 distinguishable objects can yield a likelihood ratio as high as 210, with a verbal equivalent of “moderately strong support” for a proposition that two cable ties have the same isotopic composition because they originate from the same batch rather than by random chance.     

“Give me some space”: exploring youth to parent aggression and violence

A small scale qualitative project, undertaken by an interdisciplinary domestic violence research group involving academic researchers and research assistants, with colleagues from Independent Domestic Abuse Services (IDAS), investigated youth aggression and violence against parents. Following the literature review, data was generated through several research conversations with young people (n = 2), through semi-structured interviews with mothers (n = 3) and practitioners (n = 5), and through a practitioner focus group (n = 8). Thematic analysis and triangulation of the data from parents, practitioners and young people, elicited interconnected and complex overarching themes. Young people could be both victim and perpetrator. The witnessing or experiencing of domestic aggression and violence raised the concept of ‘bystander children’. The impact of young people experiencing familial violence was underestimated by parents. For practitioners, the effects of working with domestic violence was shown to be significant - both positively and negatively.