Objective Evaluation of Subclass Characteristics on Breech Face Marks

Subclass characteristics can be found on the breech face marks left on spent cartridge cases. Even if they are assumed to be rare and their reported number is small, they can potentially lead to false associations. Subclass characteristics have been studied empirically allowing examiners to recognize them and to understand in which conditions they are produced. Until now, however, their influence on the identification process has not been studied from a probabilistic point of view. In this study, we aim at measuring the effect of these features on the strength of association derived from examinations involving subclass characteristics. The study takes advantage of a 3D automatic comparison system allowing the calculation of likelihood ratios (LRs). The similarities between cartridge case specimens fired by thirteen S&W .40S&W Sigma pistols are quantified, and their respective LRs are computed. The results show that the influence of subclass characteristics on the LRs is limited, even when these features are prevalent among the potential sources considered in a case. We show that the proportion of firearms sharing subclass characteristics should be larger than 40% of the pool of potential firearms for the effect to be significant.     

Driving racial profiling research forward: Learning lessons from sentencing research

Discretion is an integral component of the criminal justice system and is exercised by both police and the judiciary. Based on the extant research, evidence of racial/ethnic disparities within the context of traffic stops and sentencing decisions has been documented. Due to its long history of inquiry, sentencing research has developed a more thorough understanding of disparity and its correlates. This article contends that racial profiling research could expedite its development by learning from the history of sentencing research. Specifically, the extant research on sentencing decisions has demonstrated the value and utility of theory and methods as pillars of knowledge development. Therefore, progress in racial profiling research is most likely accomplished by employing similar theoretical frameworks and appropriate quantitative and qualitative approaches.     

The use of a quantitative structure-activity relationship (QSAR) model to predict GABA-A receptor binding of newly emerging benzodiazepines

The illicit market for new psychoactive substances is forever expanding. Benzodiazepines and their derivatives are one of a number of groups of these substances and thus far their number has grown year upon year. For both forensic and clinical purposes it is important to be able to rapidly understand these emerging substances. However as a consequence of the illicit nature of these compounds, there is a deficiency in the pharmacological data available for these ‘new’ benzodiazepines. In order to further understand the pharmacology of ‘new’ benzodiazepines we utilised a quantitative structure-activity relationship (QSAR) approach. A set of 69 benzodiazepine-based compounds was analysed to develop a QSAR training set with respect to published binding values to GABA_A receptors. The QSAR model returned an R² value of 0.90. The most influential factors were found to be the positioning of two H-bond acceptors, two aromatic rings and a hydrophobic group. A test set of nine random compounds was then selected for internal validation to determine the predictive ability of the model and gave an R² value of 0.86 when comparing the binding values with their experimental data. The QSAR model was then used to predict the binding for 22 benzodiazepines that are classed as new psychoactive substances. This model will allow rapid prediction of the binding activity of emerging benzodiazepines in a rapid and economic way, compared with lengthy and expensive in vitro/in vivo analysis. This will enable forensic chemists and toxicologists to better understand both recently developed compounds and prediction of substances likely to emerge in the future.     

Restructuring Local Government in Hampshire: A Case of Mistaken Community Identity?

This article examines the impact of the idea of community identity upon the Local Government Review in England. It considers the extent to which the notion of community identity was built into the Local Government Review nationally and, moreover, locally in Hampshire, and the extent to which it shaped the outcomes of the Local Government Review. Three conceptions of community identity are examined - affective, effective and deliberative community identity - and their interplay assessed in shaping the process of restructuring local government. The article argues that the issue of community identity figured prominently in the early stages of the Local Government Review, but faded away as it got caught up with the political machinations of central government, local authorities and political parties.     

Crime in the Australian fishing industry: Key issues

This research suggests that opportunities exist for a wide range of criminal activity in Australia’s commercial fishing sector.Organised crime is attracted to the fishing industry because it is percieved as being a low-risk, high-gain endeavour involving high-value, low-volume product with a lucrative overseas market. Jurisdictions are trying to implement strategies to inhabit these activities in valuable, but diminishing sectors, such as abalone. These efforts have to extend across all attractive seafood products, for example, seahorse and shark fin. To do so sucessfully will require a range of operational, legeslative and educational strategies, implemented uniformly and (where possible) simultaneously across jurisdictions and bolstered by international support and cooperation. This will inhibit the likehood of displacement and will result in a greater ability by fisheries enforcement agencies to focus their resources. Disclaimer: This research paper does not necessarily reflect the policy position of the Australian Government. The Australian Institute of Criminology (the Institute) and the Commonwealth of Australia accept no responsibility for the content, accuracy or completeness of [this] material... This material is made available on the understanding that neither the Institute nor the Commonwealth is thereby engaged in rendering professional or expert advice. The material may include views of third parties and does not necessarily reflect the views of the Institute or the Commonwealth.