The Reliability of Swipe/Wipe Classification and Directionality Determination Methods in Bloodstain Pattern Analysis

Swipe and wipe are types of transfer patterns commonly encountered at bloodied scenes. So far, there have been little published data on the reliability of evaluating these patterns. In this study, 36 bloodstain patterns were randomly assigned to 12 analysts in three separate trials, and the analysts were required to evaluate the pattern type and directionality. The results revealed that correct classifications of patterns type were problematic, with an overall error rate of 32%. Wipes created from wet bloodstains were the most difficult to identify due to the absence of signs of alteration. The directionality of swipes made with a gloved finger had a 100% success rate; however, for swipes made with cloth, the analysts mistook the direction in nearly every case, which is of significant concern, considering these are common patterns at crime scenes. This study suggested there is a need for revising the current protocols for interpretation of these pattern types.     

Proactive Policing: a Summary of the Report of the National Academies of Sciences,Engineering, and Medicine

This paper provides a summary of our report for the National Academy of Sciences, Engineering, and Medicine on proactive policing. We find that there is sufficient scientific evidence to support the adoption of many proactive policing practices if the primary goal is to reduce crime, though the evidence base generally does not provide long-term or jurisdictional estimates. In turn, we conclude that crime prevention outcomes can often be obtained without producing negative community reactions. However, the most effective proactive policing strategies do not appear to have strong positive impacts on citizen perceptions of the police. At the same time, some community-based strategies have begun to show evidence of improving the relations between the police and public. We conclude that there are likely to be large racial disparities in the volume and nature of police–citizen encounters when police target high-risk people or high-risk places, as is common in many proactive policing programs. We could not conclude whether such disparities are due to statistical prediction, racial animus, implicit bias, or other causes.

     

Economic conditions and voting in Japanese house elections

Based on a Downsian perspective of voting behavior, this study assesses the extent to which short-term regional economic conditions influenced the electoral district vote for Japan’s ruling Liberal Democratic Party in the 1983 and 1986 elections to the House of Representatives. Unlike traditional scholarly interpretations, which stress the unique and nonindividualistic determinants of Japanese voting, our regression estimates indicate that economic voting in Japan resembles that identified in studies of other political systems, where unemployment has been shown to be an important predictor of the vote, which income is not. The findings fit with more recent evidence that Japanese political behavior is genuinely susceptible to comparative analysis, and point to the need for a revised understanding of Japanese electoral behavior.     

Commentaries on the issue

Abstract

The use of informers is morally problematic for police institutions, for investigation managers, and for those individuals either who act as informers or who have daily responsibility for handling informers. This paper examines the moral issues concerning informers at each of these levels. Recourse to informers can be accommodated within Miller and Blackler's moral theory of policing. Within this context, criteria for the morally justifiable deployment of informers are proposed and supplemented with further proposed criteria for morally justifiable informer participation in crime. Morally justifiable recruitment of informers is also considered. Despite directly serving the purpose of policing, informers do not incur police professional obligations.