The Accuracy of Handheld Pre‐Arrest Breath Test Instruments as a Predictor of the Evidential Breath Alcohol Test Results

Drunk driving is a serious threat to public safety. All available and appropriate tools for curbing this threat should be employed to their full extent. The handheld pre‐arrest breath test instrument (PBT) is one tool for identifying the alcohol‐impaired driver and enforcing drunk driving legislation. A set of data was evaluated (n = 1779) where the PBT instrument was employed in drunk driving arrests to develop a multivariate predictive model. When maintained and operated by trained personnel, the PBT provides a reasonable estimate of the evidential test result within the relevant forensic range (95% prediction interval:  ± 0.003 g/210 L). ROC analysis shows that a multivariate model for PBT prediction of the evidentiary alcohol concentration above versus below the legal limit of 0.08 g/210 L has excellent performance with an AUC of 0.96. These results would be of value in evidential hearings seeking to admit the PBT results in drunk driving trials.     

Failings of Trauma‐Specific and Related Psychological Tests in Detecting Post‐Traumatic Stress Disorder in Forensic Settings

Judges and juries tend to be particularly impressed by test data, especially quantitative test data. Psychometric tests specific for assessing the presence of post‐traumatic stress disorder (PTSD) are commonly employed by forensic mental health evaluators. Most of these instruments, however, have been designed to detect PTSD in treatment or research, and not forensic, settings. Those who rely on these measures without adequate awareness of their often significant limits in correctly identifying malingering may induce finders of fact to inordinately confidently accept the presence of PTSD. This article reviews problematic structural and content components of trauma‐specific and related instruments used to evaluate PTSD and discusses the utility of specific techniques liable to be used in forensic settings to “fool” these measures.     

Diagnostic Value of PSA and AP Tests for the Detection of Spermatozoa in Postmortem Swabs from the Genital and Anal Region in Males

The aim of this study was to clarify whether positive results for prostate‐specific antigen (PSA) and acid phosphatase (AP) occur in postmortem swabs from the genito‐anal region in males (n = 80; 4 regions) and females (n = 20; 3 regions) and to calculate the positive predictive value (PPV) concerning the presence of spermatozoa. In male subjects, the highest incidence of positive test results was found in urethral swabs (PSA 76%, AP 71%) and the lowest frequencies appeared in perianal and rectal swabs (15–20%). Microscopic evaluation for spermatozoa was positive between 39% in urethral swabs and 1% in rectal swabs. PPV regarding positive identification of spermatozoa was 33.3% for PSA and 31.5% for AP. The combination of both tests yielded a PPV of 38.2%. In female cases, no spermatozoa were identified, and one case was PSA‐ and AP‐positive in perianal swabs. Our findings indicate that PSA and AP tests are of limited value for the postmortem detection of spermatozoa in male subjects.     

Understanding Variations of Soil Mapping Units and Associated Data for Forensic Science

Soil samples have potential to be useful in forensic investigations, but their utility may be limited due to the inherent variability of soil properties, the wide array of analytical methods, and complexity of data analysis. This study examined the differentiation of similar soils based on both gross (texture, color, mineralogy) and explicit soil properties (elemental composition, cation exchange, Fe‐oxyhydroxides). Soils were collected from Fallbrook and adjacent map units from Riverside and San Diego Counties in California. Samples were characterized using multiple techniques, including chemical extracts, X‐ray diffraction (XRD), and Fourier transform infrared spectroscopy. Results were analyzed using multiple analytical approaches to compare counties and land uses. Some analyses (XRD, extractions) were better at distinguishing among samples than others (color, texture). Ratios of rare earth elements were particularly useful for distinguishing samples between counties. This potential to “fingerprint” soils illustrates the usefulness of a comprehensive soil database for criminal investigators.     

Identification of Natural Images and Computer‐Generated Graphics Based on Statistical and Textural Features

To discriminate the acquisition pipelines of digital images, a novel scheme for the identification of natural images and computer‐generated graphics is proposed based on statistical and textural features. First, the differences between them are investigated from the view of statistics and texture, and 31 dimensions of feature are acquired for identification. Then, LIBSVM is used for the classification. Finally, the experimental results are presented. The results show that it can achieve an identification accuracy of 97.89% for computer‐generated graphics, and an identification accuracy of 97.75% for natural images. The analyses also demonstrate the proposed method has excellent performance, compared with some existing methods based only on statistical features or other features. The method has a great potential to be implemented for the identification of natural images and computer‐generated graphics.     

Who's Afraid of WikiLeaks? Missed Opportunities in Political Science Research

Leaked information, such as WikiLeaks’ Cablegate, constitutes a unique and valuable data source for researchers interested in a wide variety of policy‐oriented topics. Yet political scientists have avoided using leaked information in their research. This article argues that we can and should use leaked information as a data source in scholarly research. First, the methodological, ethical, and legal challenges related to the use of leaked information in research have been considered, concluding that none of these present serious obstacles. Second, how political scientists can use leaked information to generate novel and unique insights concerning political phenomena using a variety of quantitative and qualitative methods have been shown. Specifically, how leaked documents reveal important details concerning the Trans‐Pacific Partnership negotiations, and how leaked diplomatic cables highlight a significant disparity between the U.S. government's public attitude toward traditional knowledge and its private behavior have been demonstrated.     

Migration Pessimism and the Subjective Well‐Being of Migrant Households in Mexico

A new migration pessimism argues that the economic benefits of international labour migration for migrant households may not justify the social costs. This article provides a test of this argument based on the author's survey of 304 households in Jerez municipio (municipality), Zacatecas, Mexico, in 2009. The results indicate that active households (those with at least one migrant abroad) perceived their economic situation to have improved more, but both their social cohesion and their happiness to be less than those of non‐active households. Social cohesion (family unity and maintenance of values) is shown to be pivotal in the happiness differential enjoyed by the non‐active households.     

From voter ID to party ID: How political parties affect perceptions of election fraud in the U.S.

This paper uses a survey experiment to assess what individuals understand about election fraud and under what circumstances they see it as a problem. I argue that political parties are central to answering both these questions. Results from the 2011 CCES survey suggest respondents are able to differentiate between the relative incentives of Democrats and Republicans where fraud tactics are concerned, but whether voters see these tactics as problematic is heavily influenced by partisan bias. The results show little support for the notion that partisan ideology drives fraud assessments, and suggest support for the idea that individual concerns for fraud are shaped a desire for their preferred candidate to win. These results offer insights that might be applied more broadly to questions of perceptions of electoral integrity and procedural fairness in democracies.     

Exile and Diaspora in an Atypical Context: Chileans and Argentineans in the United States (1973–2005)

This article focuses on two groups of Southern Cone exiles' communities, Chileans and Argentineans, choosing to settle down in an atypical destination: the United States. After estimating some qualitative and quantitative findings, the article delves into the ways these communities settle down, remember their relationship with politics, maintain their connection with exiled fellow‐countrymen worldwide and perceive their national identity. By relying on an empirical, single‐case perspective, with no theoretical ambitions to extrapolate its conclusions to other contexts, this article examines the extent to which the conceptualisation of the exile and diaspora categories changes when applied to these two communities.     

Nationalism and the Rise of Peru's General Velasco

Velasco's brand of military nationalism marked a real break from the orientation of the majority of Peruvian military regimes, which were pro‐United States and espoused limited government. Many attempts have been made to explain this outcome, but the release of documents from British and United States archives clarify certain issues. Above all, Velasco's use of the nationalist card enabled him to win over decisive support from both the military and political society. This support gave him sufficient leverage to consolidate his personal position, which he did before launching a major programme of domestic property expropriation.