Development of an instrument for assessing the quality of forensic evidence and expert testimony from three feature-comparison methods: DNA,voice, and fingerprint analysis

In a context of rising violence and long-lasting impunity, in 2008, Mexico's criminal justice system underwent a radical change from an inquisitorial model to an adversarial one, to make it more effective, transparent, and expeditious. The new system tasked judges with publicly determining the admissibility of forensic evidence, as well as assessing its technical quality and probative value—tasks for which they currently receive little to no training. With the aim of contributing to the consolidation of the adversarial model, a comparative framework—in the form of a checklist—of the analysis of fingerprints, DNA samples, and voice recordings was created. To do so, a review of the academic literature, published reports, and guidelines was performed. The collected data were synthesized and submitted to a panel of Mexican judges, who provided feedback on its adequacy. The framework focuses on the steps on which quality assurance of forensic evidence depends, organized in five discrete stages that span from the collection of samples at the scene of a crime to the presentation of evidence at trial, specifying the main technical criteria experts should state to allow a decision maker to examine its accuracy and reliability. Differences and commonalities among the three methods were identified, particularly in terms of how qualitative and quantitative analyses are performed in each. Besides its potential usefulness as an aid for judicial decision-making, the checklist could be a valuable resource for training programs aimed at judges, as well as quality assurance programs.     

The communitarian revolutionary subject: new forms of social transformation

Abstract

The hope for a unique revolutionary actor in the twentieth century evaporated as a result of the weaknesses of social organisations. This paper examines the potential of an almost-forgotten group of revolutionary actors – collectively organised and deliberately involved in processes of social and productive transformation with a legitimate claim to territory – whose present-day activities involve them in concerted processes to consolidate a different constellation of societies on the margins of the global capitalist system. Indigenous and peasant communities throughout the Americas are self-consciously restructuring their organisations and governance structures, taking control of territories they claimed for generations. They are also reorganising production to generate surplus, assembling their members to take advantage of underutilised resources and peoples’ energies for improving their ability to raise living standards and assure environmental conservation and restoration. These communities are not operating in isolation. They coordinate activities, share information and build alliances. Hundreds of millions of people are participating in this growing movement; they occupy much more than one-quarter of the world’s land area. There is great potential for others to join them, expanding from the substantial areas where they are already operational. Global social networks are ensuring that this dynamic accelerates.     

From Anthropology to Human Geography: Human Terrain and the Evolution of Operational Sociocultural Understanding

Human terrain is a complicated term. It has been plagued with controversy in recent years stemming from US Army implementations in the Middle East. This paper reviews the history of human terrain in three forms: as a human behavioral concept, a conflict based application, and a multidisciplinary area of research. It investigates the history of the term and its evolution from anthropological foundations to human geography and geospatial intelligence. Recommendations are given and practices are suggested to gain knowledge and understanding of people that can assist in helping in hazardous situations and avoiding conflict.     

Los Congresos Estatales y la Política Federal en México: state legislatures and federal policymaking in Mexico

The Mexican Constitution, in the Poder Legislativo, grants state legislatures the authority to introduce legislation (iniciativas de ley) in the federal congress. In this paper the authors examine this powerful mechanism through which the Mexican state legislatures can directly influence policymaking at the federal level. Using a new data set of state-led initiatives, this work: describes the frequency with which iniciativas are introduced; describes the substance, timing, and final disposition of these state-led initiatives; and explains which factors affect the probability of presenting a state-led initiative. The authors find that party competition and partisan divisions at the state and federal levels play a significant role in the use of iniciativas de los congresos estatales. The authors’ study of this peculiar authority granted to the Mexican states contributes to the rich discussion of the changing role of the states in the era of Mexico’s nuevo federalismo.     

Hair-MAP: a prototype automated system for forensic hair comparison and analysis

This paper demonstrates the feasibility of the automation of forensic hair analysis and comparison task using neural network explanation systems (NNESs). Our system takes as input microscopic images of two hairs and produces a classification decision as to whether or not the hairs came from the same person. Hair images were captured using a NEXTDimension video board in a NEXTDimension color turbo computer, connected to a video camera. Image processing was done on an SGI indigo workstation. Each image is segmented into a number of pieces appropriate for classification of different features. A variety of image processing techniques are used to enhance this information. Use of wavelet analysis and the Haralick texture algorithm to pre-process data has allowed us to compress large amounts of data into smaller, yet representative data. Neural networks are then used for feature classification. Finally, statistical tests determine the degree of match between the resulting collection of hair feature vectors. An important issue in automation of any task in criminal investigations is the reliability and understandability of the resulting system. To address this concern, we have developed methods to facilitate explanation of neural network's behavior using a decision tree. The system was able to achieve a performance of 83% hair match accuracy, using 5 of the 21 morphological characteristics used by experts. This shows promise for the usefulness of a fuller scale system. While an automated system would not replace the expert, it would make the task easier by providing a means for pre-processing the large amount of data with which the expert must contend.     

Ethnic Socialization,Family Cohesion,and Ethnic Identity Development Over Time among Latinx Adolescents

Journal of Youth and Adolescence - Family socialization of one’s ethnic culture is essential for ethnic identity development among Latinx adolescents. However, less is known about how the...     

Institutional Suicide and Elite Coordination: The Spanish Transition Revisited

ABSTRACT

In the literature on democratisation, the Spanish case has a paradigmatic status, especially for the negotiations between the regime and the opposition. While these negotiations did stabilise the new regime, the transition was driven by the regime’s elites. The key event was the approval of the Law for Political Reform in November 1976, when the legislature voted its own demise. The change was done according to the rules of the system. To explain this reform, we offer a formal model of coordination and a statistical analysis of an original dataset of the 531 legislators. The reform was possible because of elites’ belief coordination.