The impact of the principles of evidence interpretation on the structure and content of statements

The Forensic Science Service (FSS) has devoted appreciable effort to developing the application of the principles of evidence interpretation. Much of the work has been reported in previous papers in this journal, in particular those that develop a model for Case Assessment and Interpretation (CAI). The principles of interpretation are restated and the implications for structure and content of statements are described.     

Interpreting small quantities of DNA: the hierarchy of propositions and the use of Bayesian networks

The dramatic increase in the sensitivity of DNA profiling systems that has occurred over recent years has led to the need to address a wider range of interpretational problems in forensic science. The issues surrounding questions of the kind "whose DNA is this?" have been the subject of considerable controversy but now it is clear that the emphasis is shifting to questions of the kind "how did this DNA get here?" Such issues are discussed in this paper and new insights are provided by two particular recent developments. First, the notion of the "hierarchy of propositions" that has arisen from a project called Case Assessment and Interpretation (CAI) that has been running in the British Forensic Science Service (FSS). Second, a technique for drawing inferences in the face of many interacting considerations, known as "Bayesian networks"--or "Bayes' nets" for short--that has been the subject of an earlier paper in this journal (1). The discussion is carried out by means of case studies, based on actual cases. It is clear that, whereas the inference in relation to the source of the DNA in a crime sample might be overwhelmingly strong, the inference in relation to the propositions that a jury must consider relating to the identity of the actual offender may be much more tentative.     

An evaluation of procedures for assessing competency to stand trial

In a field experiment involving 120 defendants at Bridgewater State Hospital in Massachusetts, the authors evaluated three instruments for assessing competency to stand trial: the Competency Screening Test (CST), Competency Assessment Instrument (CAI), and Interdisciplinary Fitness Interview (IFI). The CST (a paper-and-pencil test) was administered by a research assistant and scored by trained graduate students. Lawyers, psychologists, and social workers were recruited and trained in the use of the other instruments, then assigned as individuals (CAI) or teams (IFI) to conduct interviews and assess subjects. The performance of the project interviewers was compared against two yardsticks: (1) actual decisions reached by the regular Bridgewater staff, and (2) a consensus of two nationally respected experts who reviewed the cases and formed independent competency judgments. Both the CAI and IFI performed well under these conditions, indicating that one-time interviews by well-trained persons can lead to accurate competency decisions in the majority of cases. The authors conclude that hospitalization for competency assessment is rarely necessary.     

Explaining China's approach to investor-state dispute settlement reform: A contextual perspective

China's approach to ISDS reform is widely perceived as undecided and ambiguous. This paper provides the first detailed analysis of China's submission to the UNITRAL Working Group III and situates China's approach in the context of global dialogue of ISDS reform and competing reform proposals. The paper shows that China's open, flexible, and evolving approach to ISDS reform could be better understood by a contextual evaluation of the pertinent factors which have contributed to its formation. Moreover, this paper explains why China did not sign up to the EU's investment court system (ICS) proposal in the EU-China Comprehensive Agreement on Investment (CAI). Lastly, the paper argues that China should reconsider its attitude towards the ICS in the CAI context and that the EU's recent suggestion that the envisaged multilateral investment court may adopt an ‘open architecture’ is likely to enhance its appeal to China.     

A novel network-based analysis to measure efficiency in science and technology parks: the ISA framework approach

In the last years, Science and Technology Parks (STPs) have been considered facilitators of inter-organizational relationships, as well as instruments of public policy, by creating networks and allowing access for the learning of local innovation. In this study, we propose a quantitative tool as support for measuring the efficiency of STPs through the analysis of the complex networks they form. We present a generic framework called the Inter-Relationship Science-Park Analysis (ISA) framework to study STPs at three different levels of management: (1) individual entities (research centres, universities, innovation companies, etc.); (2) STP global management; and (3) productive sector development. Moreover, we have applied the ISA framework to a real-world case study: the Walqa Science and Technology Park. Through it we have been able to know what relationships are established within this Science and Technology Park and which are the most important nodes in this network of interactions.     

Computer-Aided Instruction in Law: Theories, Techniques, and Trepidations

Legal education is only beginning to make use of the technological capabilities of computers as a medium for instructional design. In this article the authors show the applicability of computer-assisted instruction to law through programmed instructional techniques. They trace the two decades of development of computer-assisted instruction (CAI) in law, the use and misuse of the computer's capabilities, the impact of CAI on law student attitudes and performance, and the positive student endorsement. They carefully analyze the computer's capacity for use in memory drills, tutorial sessions, and simulation exercises. They do not offer an unrestricted endorsement of the computer's capabilities but hope for the continuing development of CAI in the legal education process.     

Cervical Arterial Injury After Strangulation—Different Types of Arterial Lesions

After strangulation, cervical arterial injuries (CAI) are uncommon. We report three unusual cases where strangulation induced immediate stroke. CAI were examined using brain CT scan and Doppler ultrasonography in the three cases and then by autopsy in one of the victims. One of the two victims who survived the attempted strangulation had a unilateral carotid dissection, whereas in the other victim, no arterial dissection or thrombosis was observed. As regards the deceased victim, the autopsy confirmed the bilateral dissection showed on CT scan and Doppler ultrasonic examination and revealed that both carotid arteries were dilated up to two times the normal diameter. Microscopic examination showed a major bilateral hemorrhagic dissection of the media with obliterating fibrous endarteritis lesions associated with inflammatory damage. CT scan with arteriography does not demonstrate all the different types of arterial injury, particularly atheromatous embolism, direct compression, or prolonged spasm. Thus, traditional autopsy remains an essential forensic tool after strangulation to show the type of CAI.     

Methodological Considerations Affecting the Initiation and Utilization of Program Evaluation

This article addresses the methodological issues affecting the degree to which program evaluations are initiated and utilized. The problems associated with traditional program evaluations that have been conducted in the United States are presented, and alternative procedures are suggested which may serve to increase the efficacy of future evaluations performed within industrialized nations. The article is based on a paper presented at the International Symposium on Sociological Perspectives on Delinquency Prevention in 1981 at Wuppertal Germany; financial support provided by the Deutsche Forschungsgemeinshaft (German Science Foundation).     

Forensic science and the law

Forensic Science today makes an important contribution to the operation of the Criminal Justice System providing evidence which could help decide the guilt of a suspect. Forensic Science is able to do so because it has developed to operate within the reality determined by the Criminal Justice System. Changes that are occurring today seem to upset the relationship between Forensic Sciences and the Criminal Justice System by the creation of communication problems. Examples of these problems exist in the changes occurring in the concept of death made necessary by organ transplants. These changes have shifted the focus from the quantity of life to the quality of life and make it impossible for the Forensic Scientist to answer honestly the questions that might be put him. The need for reforms in the law in view of social changes has been recognized and in many countries attempts at such changes are afoot. With these changes a new reality is being defined. Forensic Science, being a discipline that comes first in contact with a multitude of emergent problems, has a part to play in the definition of this reality.     

Proximity as a Resource Base for Competitive Advantage: University–Industry Links for Technology Transfer

One of the important arguments in favor of Science Parks is the claimed networking benefit. A total of 273 new technology-based firms (NTBFs) were surveyed. The assessing of academic knowledge and expertise by businesses located on site is a key principle of Science Parks. Science Park NTBFs stand out as a special group of small firms in terms of performance (Growth: sales and employment). The arguments presented in this paper recognize the complex nature of co-operative resources. The level of interaction in the innovation process between firms located on Science Parks and local universities is generally low, but it is higher than the level of interaction exhibited by firms that are not Science Park firms. The underlying premise of our research propositions (P1 and P2) is that the NTBF-specific co-operative resources will provide the firm with a competitive advantage. This paper, building on the resource-based theory and empirical evidence, argues that NTBFs working with universities that have more proximity achieve certain advantages. Proximity between NTBFs and universities promote the exchange of ideas through both formal and informal networks. Statistically significant differences between Science Park NTBFs and off-Park NTBFs were recorded with regard to product development in the last three years.     

Are UK undergraduate Forensic Science degrees fit for purpose?

In October 2009 Skills for Justice published the social research paper ‘Fit for purpose?: Research into the provision of Forensic Science degree programmes in UK Higher Education Institutions.’ The research engaged employers representing 95% of UK Forensic Science providers and 79% of UK universities offering Forensic Science or Crime Scene degree programmes. In addition to this, the research collected the views of 430 students studying these degrees. In 2008 there were approximately 9000 people working in the Forensic Science sector in the UK. The research found that the numbers of students studying Forensic Science or Crime Scene degrees in the UK have more than doubled since 2002–03, from 2191 in to 5664 in 2007–08. Over the same period there were twice as many females as males studying for these degrees. The research concluded that Forensic Science degree programmes offered by UK universities were of a good quality and they provided the student with a positive learning experience but the content was not relevant for Forensic Science employers. This echoed similar research by the former Government Department for Innovation, Universities and Skills on graduates from wider science, technology, engineering and mathematics degree programmes. The research also found that 75% of students studying Forensic Science or Crime Scene degrees expected to have a career in the Forensic Science sector, meaning that ensuring these courses are relevant for employers is a key challenge for universities. This paper reflects on the original research and discusses the implications in light of recent government policy.     

Theorising complex water governance in Africa: the case of the proposed Epupa Dam on the Kunene River

Various multi-dimensional governance models have been suggested by scholars and policy makers alike as suitable conceptual lenses through which to view the complexity of water governance, particularly in international river basins. While these models, most notably, the Government–Society–Science and the Hegemonic Politicians models, do provide more holistic pictures of the multiple actors at play and their interactions, the nature of these actor interactions is overly linear, and make them incapable of explaining the numerous processes within complex governance systems. They assume the dominance of a limited number of actors while ignoring various feedback loops. This paper therefore provides a critical review of the Government–Society–Science and the Hegemonic Politicians models. Our alternative perspective is derived from complexity theory as it pertains to water governance. Explaining water governance through the complexity lens highlights the myriad of actors that act within international river basins and the consequences of their actions; something that is lacking within the traditional models. This holds implications not only for decision-making in river basins and water resources management in particular, but also for theoretical developments that feed back into the policy arena. Complexity theory paints a more nuanced picture for the decision maker. We put forward this view using the proposed Epupa Dam on the Kunene River as a case study where various actors interact in the debate around the suggested dam.     

Quality assurance testing of an explosives trace analysis laboratory--further improvements

The Forensic Explosives Laboratory (FEL) operates within the Defence Science and Technology Laboratory (DSTL) which is part of the UK Government Ministry of Defence (MOD). The FEL provides support and advice to the Home Office and UK police forces on matters relating to the criminal misuse of explosives. During 1989 the FEL established a weekly quality assurance testing regime in its explosives trace analysis laboratory. The purpose of the regime is to prevent the accumulation of explosives traces within the laboratory at levels that could, if other precautions failed, result in the contamination of samples and controls. Designated areas within the laboratory are swabbed using cotton wool swabs moistened with ethanol water mixture, in equal amounts. The swabs are then extracted, cleaned up and analyzed using Gas Chromatographs with Thermal Energy Analyzer detectors. This paper follows on from a previous published paper describing the regime and summarizing subsequent results from approximately 6 years of tests. Lessons learned and improvements made over the period are also discussed. Monitoring samples taken from surfaces within the trace laboratories and trace vehicle examination bay have, with few exceptions, revealed only low levels of contamination, predominantly of RDX. Analysis of the control swabs, processed alongside the monitoring swabs, has demonstrated that in this environment the risk of forensic sample contamination, assuming all the relevant anti-contamination procedures have been followed, is so small that it is considered to be negligible. The monitoring regime has also been valuable in assessing the process of continuous improvement, allowing sources of contamination transfer into the trace areas to be identified and eliminated.     

Trends in Converted Firearms in England & Wales as Identified by the National Firearms Forensic Intelligence Database (NFFID) Between September 2003 and September 2008

Abstract: The National Firearms Forensic Intelligence Database (NFFID © Crown Copyright 2003‐2008) was developed by The Forensic Science Service (FSS) as an investigative tool for collating and comparing information from items submitted to the FSS to provide intelligence reports for the police and relevant government agencies. The purpose of these intelligence reports was to highlight current firearm and ammunition trends and their distribution within the country. This study reviews all the trends that have been highlighted by NFFID between September 2003 and September 2008. A total of 8887 guns of all types have been submitted to the FSS over the last 5 years, where an average of 21% of annual submissions are converted weapons. The makes, models, and modes of conversion of these weapons are described in detail. The number of trends identified by NFFID shows that this has been a valuable tool in the analysis of firearms‐related crime.     

Does image editing improve the quality of latent prints? An analysis of image-editing techniques in one crime laboratory

Field research within latent print comparison has remained sparse in the context of an otherwise growing body of literature examining the discipline. Studies examining how ACE-V procedures are implemented within active crime laboratories are especially lacking in light of research suggesting significant variability in examiner practices despite standardized ACE-V procedures. To date, no studies have examined a potentially important aspect of the Analysis phase: digital image editing. We provide information on the prevalence and types of latent print image editing within one laboratory (i.e., Houston Forensic Science Center), examine the potential effect of image editing on objective print quality and clarity (i.e., LQMetrics scores), and explore potential examiner differences in editing effectiveness. Results indicate that most latent prints are edited in some manner, and that image editing improves the quality and clarity of print images as defined by an objective quality metric, although examiners varied in their ability to improve the clarity of print images. Findings suggest that formal guidance or documentation of standard editing procedures would likely improve the reliability of examiner conclusions early in the latent print comparison process.     

Dating of ballpoint pen ink

In this paper we describe a case in which a cash book, dated of the year 2000, was sent to the Forensic Science Division, Document Laboratory, Zurich Canton Police in March 2003. The questioned document was a list of 29 pages containing a consecutive handwritten numbering and dated entries (payments) made of blue ballpoint pen ink. By definition, a cash book has to be written by hand and the entries have to be made daily. The questioned document was suspected to have been written within a short period (e.g., a few hours) and backdated. The document lab was asked to determine the date of the entries of the questioned list. On one hand, we were asked, if the cash book had been kept on account consecutively during the period of one year, and on the other hand, the judges were interested in knowing, if the document could have been written in 2003 and back dated to 2000. To answer these questions, the document was examined for latent elements by electrostatic detection device (ESDA). The relative dating of the entries was performed by the quantification of the ballpoint pen ink dyes and their degradation products using HPLC. Results show that it is possible to determine the relative age of entries written by ballpoint pen within a relatively short time scale, if storage and supporting material of the different samples are the same or at least similar.     

The individuality of fibres used to provide forensic evidence--not all blue polyesters are the same.

Fibres used in forensic casework suffer from a disadvantage common to other forms of trace evidence--it is not possible to state with absolute certainty that they originate from a specific source. Target fibre studies, population studies and research on 'blocks of colour' have effectively demonstrated the polymorphism of textile fibres (particularly man-made ones) and have shown that when a fibre is believed to have a specific putative source, the chance that it has originated from a different source purely by coincidence is extremely remote. A study by Houck MM (Houck MM, Inter-comparison of unrelated fibre evidence. Forensic Science International 2003; 135: 146-149) has shown that no coincidental matching fibres were recovered from items of clothing examined in 20 unrelated crimes. The study involved over two million comparisons. This work goes a step further, and using the example of blue polyester fibres shows that even within a very narrow segment of the whole general fibre population, many examples of a specific colour/type of man-made fibre taken from random sources can be compared and the chance of any two being the same is very low. These studies should help to show the specificity and value of transferred fibres in providing forensic evidence.     

Quality assurance testing of an explosives trace analysis laboratory — Further improvements to include peroxide explosives

The Forensic Explosives Laboratory (FEL) operates within the Defence Science and Technology Laboratory (DSTL) which is part of the UK Government Ministry of Defence (MOD). The FEL provides support and advice to the Home Office and UK police forces on matters relating to the criminal misuse of explosives. During 1989 the FEL established a weekly quality assurance testing regime in its explosives trace analysis laboratory. The purpose of the regime is to prevent the accumulation of explosives traces within the laboratory at levels that could, if other precautions failed, result in the contamination of samples and controls. Designated areas within the laboratory are swabbed using cotton wool swabs moistened with ethanol:water mixture, in equal amounts. The swabs are then extracted, cleaned up and analysed using Gas Chromatography with Thermal Energy Analyser detectors or Liquid Chromatography with triple quadrupole Mass Spectrometry. This paper follows on from two previous published papers which described the regime and summarised results from approximately 14 years of tests. This paper presents results from the subsequent 7 years setting them within the context of previous results. It also discusses further improvements made to the systems and procedures and the inclusion of quality assurance sampling for the peroxide explosives TATP and HMTD. Monitoring samples taken from surfaces within the trace laboratories and trace vehicle examination bay have, with few exceptions, revealed only low levels of contamination, predominantly of RDX. Analysis of the control swabs, processed alongside the monitoring swabs, has demonstrated that in this environment the risk of forensic sample contamination, assuming all the relevant anti-contamination procedures have been followed, is so small that it is considered to be negligible. The monitoring regime has also been valuable in assessing the process of continuous improvement, allowing sources of contamination transfer into the trace areas to be identified and eliminated.     

Basic research and the success of federal lab-industry partnerships

This paper examines the role that basic research plays in the strategies pursued by industry in their interactions with federal labs. It draws on questionnaire-based data of 229 federal laboratory-industry joint R&D projects with 219 companies and 27 laboratories. The study documents the relative importance of basic research in the success of the interactions by comparing the incidence of basic research on several indicators of success. The study shows that, even though projects involving basic research tend to have higher costs, they also have a high percentage of product outputs in the short term. Typical high payoff strategies for partnership were those in which the company performed several technical roles and the federal laboratory was more narrowly focused. The authors gratefully acknowledge the support of the National Science Foundation, Research on Science and Technology Program, Contract No. 9220125. The views expressed here are the authors' and do not necessarily reflect those of the National Science Foundation or any other institution.     

Do we need a forensic science teaching network?

The challenging events of the past year have forced those of us working in higher education to adapt our teaching practices to conform to the restrictions put in place. For many this has been an opportunity to take a fresh view of the way material has been delivered in the past, and critically reflect on how it might be delivered in the future. There has been an explosion of innovative ideas and the introduction of support networks such as ‘#RemoteForensicCSI’ to aid with sharing these new innovations and examples of good practice.However, the past year has also helped to highlight a lack of an established network that could support the teaching of forensic science in the UK. Teaching networks within the UK exist for related disciplines, such as the Royal Society of Chemistry’s Higher Education Chemistry Teaching Network, but no network focuses on the teaching challenges specific to forensic science. Such a network could help to address the gap in pedagogical research to help support more effective teaching and give learners the best opportunities possible. This would complement the work of the Chartered Society of Forensic Science including upholding accreditation standards and the existing Link Member Scheme, whilst providing an environment to specifically support the teaching of forensic science. Any network could also look to link with other networks internationally such as the Council of Forensic Science Educators in the USA and identify examples of good practice worldwide that could be used to enhance and inform forensic science teaching in the UK.The teaching of forensic science is multifaceted with a need to strike a balance between practical skills and theoretical knowledge. Like many vocational courses forensic science teaching staff have a diverse range of backgrounds, encompassing both academic and practitioner experience. This results in a range of experiences and approaches to teaching and delivery, creating a fantastic melting pot for ideas, but outlets for sharing these innovative approaches are limited. This article will highlight some of the pedagogical gaps within forensic science teaching and areas that we could learn from. Most importantly, it will issue a clarion call to those working in this area to push for a UK Forensic Teaching Network.