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Rachel Wilson BA Clare McFadden PhD Samantha Rowbotham PhD 《Journal of forensic sciences》2023,68(3):731-742
The frequency and distribution of fractures are commonly utilized to assist in interpreting the manner of death. In cases of alleged suicide by hanging, however, the evidence base for the frequency and patterning of laryngohyoid and cervical vertebrae fractures resulting from such blunt force traumatic events is limited and so fractures cannot be reliably used to assist in interpreting the manner. Using meta-analytic techniques, this study aimed to estimate frequency and distribution of fractures in the context of relevant intrinsic and extrinsic variables. A systematic review of the literature identified 20 studies with relevant data (8523 cases of suicide by hanging). Meta-analyses identified the frequency and distribution of fractures present and how fracture frequency was affected by the subgroups of age, sex, completeness of suspension, ligature knot position and study design. Results indicated that fracture frequency was variable, there was no unique patterning, and high levels of heterogeneity were present in all variable sub-groups. Age was the only subgroup to show differences. Findings suggest that neck fracture frequency is inconsistent and cannot be predicted by the chosen variables. Subsequently, neck fractures in isolation should not be given weight in medico-legal interpretations of a hanging death as suicidal. 相似文献
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Sudhir K. Sinha PhD Hiromi Brown PhD Hailey Holt BS Mah-ro Khan MS FS Joanne B. Sgueglia BA Gina Murphy MS 《Journal of forensic sciences》2023,68(3):1020-1035
Forensic casework samples often include human hairs, teeth, and bones. Hairs with roots are routinely processed for DNA analysis, while rootless hairs are either not tested or processed using mitochondrial DNA. Bones and teeth are submitted for human remains identifications for missing persons and mass disaster cases. DNA extraction from these low templates and degraded samples is challenging. The new InnoXtract DNA extraction method utilizes magnetic beads that are optimized to bind small DNA fragments, as small as 100 base pairs, to purify high-yield DNA from compromised samples. This validation study evaluates InnoXtract's ability to obtain amplifiable DNA from samples such as rootless hairs and skeletal remains. Studies performed include sensitivity, stability, repeatability, reproducibility, non-probative samples, and comparison to standard organic extractions. Sensitivity studies demonstrate average yield recoveries ranging from 53% to 100% and 73% to 85% for the InnoXtract hair and bone methods, respectively. Studies demonstrate consistent results across a range of sample types, such as insulted and un-insulted bone and teeth, as well as hair shafts from donors of various ages, gender, race, and hair characteristics. The InnoXtract bone method outperformed organic extraction. The method was successfully automated on a MagMAX™ Express-96, with recoveries over 70% relative to the manual version. InnoXtract has the potential as an automated high-throughput, high-yield bone extraction method with 6 h of total extraction time for up to 96 samples. The validation study results demonstrate that the InnoXtract kits produce high-yield and high-quality DNA from compromised bone, teeth, and hair shaft samples. 相似文献
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Kingi Snelgar BA/LLB 《Commonwealth Law Bulletin》2013,39(1):127-151
Recent decisions of New Zealand courts illustrate that domestic proceedings may not be effective to recognise indigenous property rights, nor to address grievances that stem from breaches of customary indigenous rights. One possibility for Māori to have their rights enforced is to consider using international law. Gains have been made in international law with regard to indigenous rights; one noteworthy decision is Mayagna (sumo) Awas-Tingni Community v The Republic of Nicaragua. In this case, a universal and generic property right was extended consistently with emerging indigenous rights to include an indigenous right to customary land tenure. This paper considers whether the International Covenant on Civil and Political Rights can carry a property right for indigenous peoples in New Zealand. 相似文献
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False-negative probability in the SEM/EDS automated discovery of iGSR particles: A Bayesian approach
Martín A. Onetto MSc Edgardo Carignano BA Rodolfo G. Pregliasco PhD 《Journal of forensic sciences》2023,68(5):1792-1799
The automated search software integrated with a scanning electron microscope (SEM/EDS) has been the standard tool for detecting inorganic gunshot residues (iGSR) for several decades. The detection of these particles depends on various factors such as collection, preservation, contamination with organic matter, and the method for sample analysis. This article focuses on the influence of equipment resolution setup on the backscattered electron images of the sample. The pixel size of these images plays a crucial role in determining the detectability of iGSR particles, especially those with sizes close to the pixel size. In this study, we calculated the probability of missing all characteristic iGSR particles in a sample using an SEM/EDS automated search and how it depends on the image pixel resolution setup. We developed and validated an iGSR particle detection model that links particle size with equipment registers and applied it to 320 samples analyzed by a forensic science laboratory. Our results show that the probability of missing all characteristic iGSR particles due to their size is below 5% for pixel sizes below 0.32 μm2. These findings indicate that pixel sizes as large as twice the one commonly used in laboratory casework, that is, 0.16 μm2, are effective for initial sample scanning, yielding good detection rates of characteristic particles that could exponentially reduce laboratory workload. 相似文献
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冯友兰先生一生致力于高校教育,有着深刻的教育思想和丰富的教学经验,学术独立是贯穿其中的主线。冯先生在学术独立的维度、举措、意义等方面都有深刻的认识,对我们当下的高校改革有重要的现实意义。 相似文献
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