Contemporary methods of labeling dental prostheses--a review of the literature

Forensic identification (ID) based on an assessment of the dentition is commonplace. However, despite an increase in the oral health of Western populations, there are still many millions of individuals who are edentulous and whom have been treated with completed dentures. In the United Kingdom alone over 300,000 patients are rendered edentulous each year. In order to facilitate the ID of such individuals a number of forensic and governmental organizations have recommended that dentures be labeled. A number of labeling systems exist which can be broadly separated into inclusion systems, marking systems, and novel methods. Each of the commonly described systems are demonstrated with an assessment of their strengths and weaknesses. It is recommended that an inclusion denture marker, preferably metallic, should be used in order to withstand the most common postmortem assaults.     

The barriers to achieving an evidence base for bitemark analysis

Forensic dentistry is the union of two scientific disciplines, both of which are undergoing a renewed scientific rigor. In forensic science the advent of the Daubert ruling has required that judges assess the forensic value of 'expert testimony' ensuring that techniques, methodologies and practices are not only commonly accepted (as was the previous hurdle during the Frye era) but that error rates, assessment of reliability and validation studies are published to support their use. This new degree of judicial scrutiny has been mirrored in the field of dentistry itself, where organisations search and summarise randomised controlled trials in order to recommend best practice and devise clinical care pathways that are firmly grounded in proven scientific research. Despite the obvious drive from both of these professions, forensic dentistry, and in particular the sub-discipline of bitemark analysis, has been remarkably slow to address the obvious deficiencies in the evidence base that underpins this element of forensic science. Reviews of the literature reveal that the vast majority of published works are case reports, and very little primary literature exists. This paper reviews those studies that have assessed aspects of bitemark analysis including the crucial issue of the uniqueness of the human dentition; the application of transparent overlays and the application of statistical probabilities in bitemark conclusions. There are numerous barriers to undertaking high quality research in the field of bitemark analysis, the most important of which is the use of a gold-standard that is acceptable both in terms of diagnostic research but is also forensically relevant. If bitemark analysis is to continue to play a role in the judicial process then there is an urgent need for high quality studies that meet the levels of forensic and scientific scrutiny applied to other disciplines within the criminal justice system. Studies are required to determine not that the human dentition is unique, but how this asserted uniqueness is represented on human skin and other substrates. The error rates associated with the analysis of bitemarks are required on a procedural level as well as an individual practitioner basis and scales and interpretative indices of bitemark severity and forensic significance should be validated and introduced into common use.     

The Court for Sexual Offences: perceptions of the families of the victims of sexual offences

This article aims to evaluate the degree to which the Court for Sexual Offences in Bloemfontein, Free State, South Africa and associated auxiliary institutions meet the needs of the families of the victims of sex-crimes. The perceptions of 24 family members of victims were obtained. These individuals generally perceived the functioning of the Court and its auxiliary institutions in a positive light. However, perceptions of the time that cases took to come to trial and the standard of post-trial interaction between the Court and the families was not positive. A need for more effective victim-care at both social and psychological levels was identified. Future psycho-legal research possibilities in this largely neglected field are highlighted.     

The Court for Sexual Offences: perceptions of the victims of sexual offences

This article explores the perceptions of sexual offence victims following their interaction with the Court for Sexual Offences in Bloemfontein, Free State, South Africa. The study primarily investigates these individuals' satisfaction with the degree to which the Court succeeds in providing more effective justice for victims and reduces secondary victimization during judicial proceedings. The respondents were generally positive with regard to their experiences with the Court. However, cases were still found to be slow in coming to trial. The treatment of the victims after their participation in the trials was found not to be of the same standard as that received before they testified. These findings point to potential changes to the current system to further enhance the Court's functioning and legitimacy amongst the people who make use of its services.     

Inference of human geographic origins using Alu insertion polymorphisms

The inference of an individual's geographic ancestry or origin can be critical in narrowing the field of potential suspects in a criminal investigation. Most current technologies rely on single nucleotide polymorphism (SNP) genotypes to accomplish this task. However, SNPs can introduce homoplasy into an analysis since they can be identical-by-state. We introduce the use of insertion polymorphisms based on short interspersed elements (SINEs) as a potential alternative to SNPs. SINE polymorphisms are identical-by-descent, essentially homoplasy-free, and inexpensive to genotype using a variety of approaches. Herein, we present results of a blind study using 100 Alu insertion polymorphisms to infer the geographic ancestry of 18 unknown individuals from a variety of geographic locations. Using a Structure analysis of the Alu insertion polymorphism-based genotypes, we were able to correctly infer the geographic affiliation of all 18 unknown human individuals with high levels of confidence. This technique to infer the geographic affiliation of unknown human DNA samples will be a useful tool in forensic genomics.     

Felony and misdemeanor defendants filed in the u.s. district courts during fiscal years 1990–95: An analysis of the filings of each offense level

The number of criminal defendants in cases filed in the federal courts increased by fewer than 1,000 from 1990 to 1995. Separate analyses of filings of felony and misdemeanor defendants revealed that there are different factors that influence the magnitude of the caseload of each offense level. The number of federal felony filings is strongly linked to staffing levels within the ninety-four U.S. attorneys’ offices, while the types of filings are a reflection of prosecution priorities. As a result, the magnitude of the felony caseload in the federal courts does not mirror either local or national crime rates. Misdemeanor filings, on the other hand, are dependent on enforcement practices of local authorities at military bases and/or national parks, and are concentrated within a few federal courts. The number of misdemeanor filings and traffic violations, in particular, are susceptible to dramatic changes when these local authorities modify their enforcement procedures.