Decision support for using mobile Rapid DNA analysis at the crime scene

Mobile Rapid DNA technology is close to being incorporated into crime scene investigations, with the potential to identify a perpetrator within hours. However, the use of these techniques entails the risk of losing the sample and potential evidence, because the device not only consumes the inserted sample, it is also is less sensitive than traditional technologies used in forensic laboratories. Scene of Crime Officers (SoCOs) therefore will face a ‘time/success rate trade-off’ issue when making a decision to apply this technology.In this study we designed and experimentally tested a Decision Support System (DSS) for the use of Rapid DNA technologies based on Rational Decision Theory (RDT). In a vignette study, where SoCOs had to decide on the use of a Rapid DNA analysis device, participating SoCOs were assigned to either the control group (making decisions under standard conditions), the Success Rate (SR) group (making decisions with additional information on DNA success rates of traces), or the DSS group (making decisions supported by introduction to RDT, including information on DNA success rates of traces).This study provides positive evidence that a systematic approach for decision-making on using Rapid DNA analysis assists SoCOs in the decision to use the rapid device. The results demonstrated that participants using a DSS made different and more transparent decisions on the use of Rapid DNA analysis when different case characteristics were explicitly considered. In the DSS group the decision to apply Rapid DNA analysis was influenced by the factors “time pressure” and “trace characteristics” like DNA success rates. In the SR group, the decisions depended solely on the trace characteristics and in the control group the decisions did not show any systematic differences on crime type or trace characteristic.Guiding complex decisions on the use of Rapid DNA analyses with a DSS could be an important step towards the use of these devices at the crime scene.     

Analysis of Dental Case Reports in the Context of Court Decisions: Causal Nexus and Aspects of Fault

The purpose of expert reports is to support the judge in his decisions, by providing technical information. However, it remains uncertain as to what extent the content of these reports is used, and if they are effectively associated with judicial decisions. The aim of this study was to perform a qualitative analysis of case reports in relation to the judicial decisions rendered in association with these reports, by determining the connection between causal nexus and aspects of fault. The case reports included lawsuits against dentists, issued by the Medical Justice Department of the State Court of Appeals of Rio Grande do Sul, Brazil, between 2010 and 2013. Comparing the percentage of agreement between case report and judicial decision, causal nexus was 79.9% and fault was 86.7%. The high percentages of agreement found in relation to fault and causal nexus highlight the relevance of expert reports in weighing the judge's decision.     

Book Reviews

Matthew Amengual, Politicized Enforcement in Argentina: Labor and Environmental Regulation. New York: Cambridge University Press, 2016. Figures, tables, appendix, notes, bibliography, index, 286 pp.; hardcover $99.99, ebook $80. Matthew C. Ingram, Crafting Courts in New Democracies: The Politics of Subnational Judicial Reform in Brazil and Mexico. Cambridge: Cambridge University Press, 2015. Maps, figures, tables, appendixes, bibliography, index, 392 pp.; hardcover, $110. Russell Crandall, The Salvador Option: The United States in El Salvador, 1977–1992. New York: Cambridge University Press, 2016. Photographs, maps, figures, list of organizations, bibliography, index, 698 pp; hardcover $99.99, paperback $39.99, ebook $32. Luis Fernando Angosto‐Ferrández, Venezuela Reframed: Bolivarianism, Indigenous Peoples and Socialisms of the Twenty‐First Century. London: Zed Books, 2015. Appendix, bibliography, index, 312 pp.; paperback, ebook. Fábio de Castro, Barbara Hogenboom, and Michiel Baud, eds., Environmental Governance in Latin America. New York: Palgrave Macmillan, 2016. Tables, figures, map, bibliography, index, 350 pp.; hardcover $31, ebook. Eduardo Alemán and George Tsebelis, eds., Legislative Institutions and Lawmaking in Latin America. New York: Oxford University Press, 2016. Figures, tables, notes, bibliography, index, 296 pp.; hardcover $90, ebook. Joseph S. Tulchin, Latin America in International Politics: Challenging U.S. Hegemony. Boulder: Lynne Rienner, 2016. Bibliography, index, 235 pp.; hardcover $60. Kevin P. Gallagher, The China Triangle: Latin America's China Boom and the Fate of the Washington Consensus. New York: Oxford University Press, 2016. Tables, figures, bibliography, index, 256 pp.; hardcover $27.95, ebook.     

Elemental analysis of 3,4-methylenedioxymethamphetamine (MDMA): A tool to determine the synthesis method and trace links

The elemental composition of 3,4-methylenedioxymethamphetamine (MDMA) powders and tablets was determined. The objective was the identification of the synthesis method and application of the elemental profile in comparative analysis. The developed analytical method comprised the digestion of a sample followed by quantitative analysis with inductive coupled plasma mass spectrometry (ICP-MS) and inductive coupled plasma atomic emission spectroscopy (ICP-AES). The sample collection consisted of a unique set of MDMA powders (57) from illicit production sites and MDMA tablets (97) taken from large seizures (over 500 tablets) in the Netherlands. The production method of MDMA could be determined for 89 of the 97 tablets. In 84 cases reductive amination using Pt as the catalyst was used, in four cases reductive amination using NaBH(4) or a similar reducing agent was employed and one mixed sample (Pt and B) was found. None of the MDMA tablets were assigned to the aluminium amalgam method. Using the elemental profile, 13 links were identified within the 97 MDMA tablets using cluster analysis based on Pearson correlations. Of these links 10 were corroborated by additional analyses.     

Allele frequencies data and statistic parameters for 13 STR loci in a population of the Brazilian Amazon Region

Allele frequencies for 13 short tandem repeat (D3S1358, vWA, D21S11, D18S51, D5S818, D13S317, D7S820, TH01, TPOX, D16S539, CSF1PO, D8S1179 and FGA) loci were determined in a sample of 325 unrelated individuals from the population of the Amazon of Belém, Brazil. These loci are the most commonly used in forensic and paternity testing. The forensic parameters investigated presented high values. The power of discrimination and the probability of exclusion for these 13 STRs are 99.999999999992% and 99.9998%, respectively. In conclusion, these 13 markers are suitable for forensic analysis and paternity tests of the Amazonian population.     

Palliative sedation in the Netherlands: starting-points and contents of a national guideline

In December 2005 the first national guideline for palliative sedation in the Netherlands was published. This guideline was developed by a committee of the Royal Dutch Medical Association, at the request of the Dutch government. The guideline defines palliative sedation as 'the intentional lowering of consciousness of a patient in the last phase of his or her life'. According to the guideline the objective of palliative sedation is to relieve suffering, and lowering consciousness is a means to achieve this. It is very important that palliative sedation is given for the right indication, proportionally, and adequately. It is the degree of symptom control, not the level to which consciousness is lowered, which determines the dose and combinations of the sedatives used and duration of treatment. The assessment and decision-making processes must focus on adequate relief of the patient's suffering, so that a peaceful and acceptable situation is created. Palliative sedation is given in the last phase of life, in the imminently dying patient. Palliative sedation raises several legal questions. In this article we describe the structure and contents of the guideline, with special attention for the main legal issues involved, like the distinction between palliative sedation and euthanasia and the process of informed consent.     

Eugenics: progress or backward movement?]

Throughout this article there is a critical analysis of how genetics presents a dilemma for "human progress". So much so, that the legal world aims to create unequivocal norms and guarantees in relation with eugenics in order to avoid attempting against human dignity. The document makes the reader reflect on the ethical problems that eugenics can entail.     

Evaluation of the placenta in a stillborn fetus to estimate the time of death

The authors present a case of a presumably unknown pregnancy, in which the newborn was found dead in the bathroom. The child was considered stillborn and the death due to natural causes. The literature on estimation of the time of fetal death is reviewed. It has been reported that certain placental histological changes are useful in predicting the time of death in stillborn fetuses, but little has been published about their potential role. Furthermore, parameters evaluated by literature in examining the placenta for determining time of fetal demise in cases of stillbirth are not uniform in the few studies that have been published. We emphasize that any attempt to estimate the time of fetal death without an adequate knowledge of placental morphological changes is futile and forensically unjustifiable, and that a comprehensive placental, external, and histological examination of the fetus is still the method of choice to gain a reliable forensic answer.     

Firing distance estimation through the analysis of the gunshot residue deposit pattern around the bullet entrance hole by inductively coupled plasma-mass spectrometry: an experimental study

The use of inductively coupled plasma-mass spectrometry (ICP-MS) in the study of gunshot residues (GSR) is relatively recent, and only a few studies have been published on the subject. In the present paper, this instrumental technique has been used to study the deposit pattern of the GSR around the bullet entrance hole, through the analysis of antimony (Sb), barium (Ba), and lead (Pb). The data obtained were used to establish a mathematical model for estimating the firing distance. Test shots using a 6.35-mm pistol were made against a target of cotton tissue, and the amounts of Sb, Ba, and Pb deposited in quadrangular pieces of the target, cut from 4 radial positions, were determined by ICP-MS. In these experimental conditions, it was possible to estimate the firing distance on the interval [20-80] cm. The best linear correlation between ln m and d, where m is the mass of Sb, Ba, or Pb in the samples, expressed in mug/g of target tissue, and d the firing distance, was obtained at radial distances between 3.5 cm and 4.5 cm from the entrance hole. The best regression curve which adjusted to the data was a linear multiple regression between the firing distance and the logarithm of the mass of each element: d = a + b(1)X(1) + b(2)X(2) + b(3)X(3), where X(1) = ln m (Sb), X(2) = ln m(Ba) and X(3) = ln m (Pb). The accuracy of firing distance estimation using only 1 or 2 elements was not significantly different from the one obtained with the 3 elements.