Detecting Submerged Bodies: Controlled Research Using Side‐Scan Sonar to Detect Submerged Proxy Cadavers

Forensic investigators routinely deploy side‐scan sonar for submerged body searches. This study adds to the limited body of literature by undertaking a controlled project to understand how variables affect detection of submerged bodies using side‐scan sonar. Research consisted of two phases using small and medium‐sized pig (Sus scrofa) carcasses as proxies for human bodies to investigate the effects of terrain, body size, frequency, swath width, and state of decomposition. Results demonstrated that a clear, flat, sandy pond floor terrain was optimal for detection of the target as irregular terrain and/or vegetation are major limitations that can obscure the target. A higher frequency towfish was preferred for small bodies, and a 20 m swath width allowed greater visibility and easier maneuverability of the boat in this environment. Also, the medium‐sized carcasses were discernable throughout the 81‐day study period, indicating that it is possible to detect bodies undergoing decomposition with side‐scan sonar.     

Literatur

Ohne Zusammenfassung     

Qualitätskonventionen in ökonomischen Feldern

Pierre Bourdieu and co-workers have analyzed markets as social fields. In the article I argue that the analyses done by Bourdieu cannot grasp the production of ?quality“ and ?worth“ in markets. This form of analyses fails also in recognizing that markets are differentiated spheres, whereby quality conventions are one principle therefore. ?Quality“ is related to field structure in a reductionist way. The critic of the concepts of field and habitus in France is introduced. The workings of Luc Boltanski and Laurent Thévenot as well as the associated approach of ?Economics of convention“ (EC) are used to compensate the identified gaps in the Bourdieuian approach to market analysis. The articles aims to sketch out how a combination of both approaches can open a research perspective for the sociological analysis of markets. The concept of quality conventions plays a pivotal role. It is related to the concept of field and combined with it. An illustrating example is given.     

Analysis of mitochondrial SNPs in addition to conventional STR-typing in a case of aggravated theft

In the field of forensic DNA typing, the analysis of Short Tandem Repeats (STRs) can fail in cases of degraded DNA. The typing of coding region Single Nucleotide Polymorphisms (SNPs) of the mitochondrial genome provides an approach to acquire additional information. In the examined case of aggravated theft, both suspects could be excluded of having left the analyzed hair on the crime scene by SNP typing. This conclusion was not possible subsequent to STR typing. SNP typing of the trace on the torch light left on the crime scene increased the likelihood for suspect no. 2 to be the origin of this trace. This finding was already indicated by STR analysis. Suspect no. 1 was excluded for being the origin of this trace by SNP typing which was also indicated by STR analysis. A limiting factor for the analysis of SNPs is the maternal inheritance of mitochondrial DNA. Individualisation is not possible. In conclusion, it can be said that in the case of traces which cause problems with conventional STR typing the supplementary analysis of coding region SNPs from the mitochondrial genome is very reasonable and greatly contributes to the refinement of analysis methods in the field of forensic genetics.     

Determining Disability: New Advances in Conceptualization and Research

This special issue of Psychological Injury and Law on disability presents state-of-the-art conceptualization and empirical research that will help psychologists and attorneys in the area of disability determination. This paper constitutes an introduction to and contextualization of the articles in the issue. It focuses on key advances in the field of disability research that are anticipated to move forward the practice of psychological injury and law. These new advances include the following: (1) a theoretical shift toward an integrative and dynamic biopsychosocial framework of health and disability, (2) development of complex multidimensional constructs of motivation, including primary, secondary, and tertiary gains and losses involved in disability claims, (3) increased emphasis on the perception of fairness and justice in disability claims from both psychological and legal perspectives, (4) increased understanding of the functional impact of psychological impairment, (5) inclusion of age-related factors in predicting disability, and (6) the interdisciplinary growth of this field.