Effects of CBRN Decontaminants in Common use by First Responders on the Recovery of Latent Fingerprints—Assessment of the Loss of Ridge Detail on Glass

Following a CBRN incident, first responders use decontamination procedures to reduce the risk of exposure. The effect of decontamination on forensic trace material has, however, not been fully examined. This study sought to evaluate the effect of five different physical or chemical decontamination materials on the recovery of latent fingerprints. Fingerprints were deposited on glass slides, decontaminated, and assessed on the presence of ridge detail. The results demonstrate that decontamination affects the quality of latent fingerprints substantially. On at least 61% of the fingerprints, a reduced amount of ridge detail was observed upon decontamination. Furthermore, development with cyanoacrylate appeared not to succeed anymore. Instead, the ability of vacuum metal deposition to successfully develop decontaminated fingerprints is demonstrated. The results from this study may contribute to an increased forensic awareness regarding decontamination and emphasize the necessity for further research into new item decontamination procedures or new forensic initiatives prior to decontamination.     

Comparison of Frequentist Methods for Estimating the Total Weight of Consignments of Drugs

Abstract: A topic in forensic statistics is the estimation of the total weight of consignments of drugs based on subsamples of which a certain fraction may not contain drugs at all. The frequentist approach to this concentrates on obtaining confidence intervals for the total weight, based on estimation of the fraction of drugs and the mean and variance of the weights of drug units. The current study shows that the resulting confidence intervals are basically unreliable, since they are based on an underestimation of the variation of the underlying statistical process. Two alternatives are given that yield asymptotically correct results. These are not reliable for small subsamples either, though, because of the inherent multimodal behaviour of the sample mean. In cases where a relatively large fraction of the consignment contains no drugs, the confidence intervals reported in the literature should not be used in practice.     

Determination of efficacy of fingermark enhancement reagents; the use of propyl chloroformate for the derivatization of fingerprint amino acids extracted from paper

The analysis of the constituents of fingerprints has been described numerous times, mainly with the purpose of determining the aging effect on fingerprints or showing the differences between donors or groups of donors. In this paper we describe the use of derivatized amino acids to determine the efficacy of the visualization reagents 1,8-diazafluoren-9-one (DFO) and ninhydrin. At present certain conditions are used for the application of these reagents, as determined by trial-and-error investigations, to the effect on fingerprints. The recovery of amino acids from a porous surface can be used as a measure for the efficacy of a visualization agent.In this paper we describe a method for the determination of the amount of amino acid left after reaction with well known fingerprint visualization reagents. This will allow a more scientific approach to method development for fingermark enhancement techniques. Furthermore, investigations on the influence of the concentration of fingermark amino acids, the order of application of and exposure time to reagents and the influence of age of the amino acids were carried out. These studies have resulted in a broader understanding of the mechanism involved in visualization of fingermarks using DFO and ninhydrin.     

Environmental migration and conflict dynamics: Focus on developing regions

As Iraq is plunging into civil war, politics and violence in the Middle East are increasingly perceived to be highly interconnected and entwined. This article offers an attempt to understand the nature and scope of this regional interconnectedness involving three of the region's states—Iraq, Syria and Lebanon. Its approach takes advantage of the work by scholars of other regions than the Middle East, more precisely those analysing the ‘new wars’ and ‘Regional Conflict Formations (rcfs) of primarily Central and West Africa and the Balkans. The article suggests that, provided some methodological problems are addressed or at least acknowledged, the rcf model offers a useful approach to studying and addressing this region's multiple conflicts. Its assessment of the rcf model's utility in reference to the Middle Eas—broken down along the suggested levels of military networks, political networks, economic/financial networks and social networks—suggests that its emphasis on material – physical linkages neglects important symbolic – political resources that easily cross borders and are equally determining in fuelling and framing conflicts. This lacuna is echoed in US policy making toward the Middle East. The article concludes that, in order to avoid myopia in both analysis and policy making, such more discursive processes ought to be integrated into and made complementary with the rcf conceptualisation of conflict-related cross-border traffic. This will also allow for better analysis of the complexity of identity politics and it underscores the fallacy of assumed Western exogeneity to this region's conflicts.     

The First Time as Tragedy,the Second as Farce? Lebanon’s Nascent Petroleum Sector and the Risks of Corruption

This article analyses the risks of corruption in Lebanon’s nascent governance structures established in preparation for a thriving petroleum sector. Engaging with comparative theory on the ‘oil curse’, the article assesses the risks of corruption in the institutional and regulatory measures and policy tools that have thus far been developed down the sector’s value chain and including revenue management and expenditure. Lebanon’s political settlement, or the ways in which its political decision-making process evolved since the Ta’if Accord, consistently caused disappointing outcomes when it comes to sound institution-building and countering corruption; despite signs of awareness of the large stakes involved, this tendency is once again discernible in the country’s preparations for petroleum sector governance.