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Journal of Forensic Sciences

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https://www.readbyqxmd.com/read/28105759/visualizing-indented-writing-on-thermal-paper-by-the-controlled-application-of-heat
#1
Matthew Johnson, John W Bond
Indented writing on thermal paper made with either one, two, or three sheets of paper above the thermal paper has been visualized by the controlled application of heat to the thermal paper at temperatures below the paper's normal color change temperature. Indentations created by applying a variable pressure to a steel letter stamp showed that, with one sheet above the thermal paper, indentations were more visible at lower pressures than with either two or three sheets above. Handwriting from 20 volunteers produced indented writing graded with most of the text clear and easy to read for all samples with one sheet above, half the samples with two sheets above and eight samples with three sheets above...
January 20, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28105649/reanalysis-of-korean-war-anthropological-records-to-support-the-resolution-of-cold-cases
#2
Emily K Wilson
Re-investigation of previously unidentified remains from the Korean War has yielded 55 new identifications, each with corresponding records of prior anthropological analyses. This study compares biological assessments for age at death, stature, and ancestry across (i) anthropological analyses from the 1950s, (ii) recent anthropological analyses of those same sets of remains, and (iii) the reported antemortem biological information for the identified individual. A comparison of long bone measurements from both the 1950s and during reanalysis is also presented...
January 20, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28105644/site-technique-and-time-related-aspects-of-the-postmortem-redistribution-of-diazepam-methadone-morphine-and-their-metabolites-interest-of-popliteal-vein-blood-sampling
#3
Eric Lemaire, Carl Schmidt, Nathalie Dubois, Raphael Denooz, Corinne Charlier, Philippe Boxho
Sampling site, technique, and time influence postmortem drug concentrations. In 57 cases, we studied drug concentration differences as follows: subclavian vein-dissection/clamping versus blind stick, femoral vein-dissection/clamping versus blind stick, right cardiac chamber, and popliteal vein-dissection and clamping only. Cases were distributed in group #1 (all cases with both techniques), group #2 (dissection/clamping), and group #3 (blind stick). Sampled drugs were diazepam, methadone, morphine, and their metabolites...
January 20, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28105632/the-micro-taphonomy-of-cold-differential-microcracking-in-response-to-experimental-cold-stresses
#4
Chantal Turpin
Cold is a central feature of environments at higher latitudes and elevations. Thus, cold-induced taphonomic changes are relevant in many forensic contexts. Fifty-two lamb bone segments were used to assess the impact of cold, freeze-thaw cycles, freeze-drying, and water immersion on microstructural cracking of bone in a series of controlled exposure experiments. For each bone segment, three thin sections were examined under a light microscope. Cold exposure caused taphonomic changes in the form of microscopic cracking...
January 20, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28097661/estimating-the-skull-to-camera-distance-from-facial-photographs-for-craniofacial-superimposition
#5
Carl N Stephan
The overlay of a skull and a face image for identification purposes requires similar subject-to-camera distances (SCD) to be used at both photographic sessions so that differences in perspective do not compromise the anatomical comparisons. As the facial photograph is the reference standard, it is crucial to determine its SCD first and apply this value to photography of the skull. So far, such a method for estimating the SCD has been elusive (some say impossible), compromising the technical validity of the superimposition procedure...
January 18, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28097647/microbiota-composition-and-pulmonary-surfactant-protein-expression-as-markers-of-death-by-drowning
#6
So-Yeon Lee, Seung-Kyun Woo, So-Min Lee, Eun-Ju Ha, Kyoung-Hee Lim, Kyung-Hwa Choi, Young-Hee Roh, Yong-Bin Eom
Pathological diagnosis of drowning remains a challenge for forensic science, because of a lack of pathognomonic findings. We analyzed microbiota and surfactant protein in the lungs for a novel diagnosis of drowning. All rats were divided into drowning, postmortem submersion, and control groups. The water, lungs, closed organs (kidney and liver), and cardiac blood in rats were assayed by targeting 16S ribosomal RNA of Miseq sequencing. Lung samples were analyzed by immunohistochemical staining for surfactant protein A...
January 18, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28090645/neonatal-limb-amputation-an-unusual-form-of-postmortem-canine-predation
#7
Kimberley J Omond, Calle Winskog, Allan Cala, Roger W Byard
Cases of postmortem canine predation often involve elderly recluses and their dogs. The face, head, and genitalia are targeted. Two unusual cases of postmortem canine predation of abandoned newborns are described to demonstrate an unusual alternative pattern of mutilation related to the small size of the decedents, marked decomposition, and canine scavenging behavior. Both bodies were abandoned/concealed soon after birth and were subsequently disturbed by dogs. Both were markedly decomposed with absent arms...
January 16, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28070907/analysis-of-explosives-by-gc-uv
#8
Jan Andrasko, Ludmila Lagesson-Andrasko, Johan Dahlén, Bengt-Harald Jonsson
A mixture of explosives was analyzed by gas chromatography (GC) linked to ultraviolet (UV) spectrophotometry that enabled detection in the range of 178-330 nm. The gas-phase UV spectra of 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), ethylene glycol dinitrate (EGDN), glycerine trinitrate (NG, nitroglycerine), triacetone triperoxide (TATP), and pentaerythritol tetranitrate (PETN) were successfully recorded. The most interesting aspect of the current application is that it enabled simultaneous detection of both the target analyte and its decomposition products...
January 10, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28070893/improving-nonmetric-sex-classification-for-hispanic-individuals
#9
Alexandra R Klales, Stephanie J Cole
Current techniques used by forensic anthropologists for the identification of unknown human skeletal remains have largely been created using U.S. Black and White samples. When applied to Hispanics, these techniques perform poorly and can lead to misclassifications; consequently, there is an imperative need for population-specific standards for Hispanics. This research examines the classification accuracies obtained by the original Walker (Am J Phys Anthropol, 136, 2008) and Klales et al. (Am J Phys Anthropol, 149, 2012) methods for nonmetric sex estimation and provides recalibrated regression equations specifically for Hispanics...
January 10, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28066906/causes-and-mechanisms-of-death-in-fatal-water-buffalo-attacks
#10
Roger W Byard
Deaths due to buffalo attack have not been well described. A 72-year-old man was trampled by a water buffalo (Bubalus bubalis) while attempting to move the animal within an enclosed area at an abattoir. At autopsy, there were numerous injuries involving the chest, head, neck, and left upper arm. Blunt force injury had resulted in multiple rib fractures with a flail chest and fracture/dislocation of the mid-cervical vertebrae caused either by physical crushing by the animal against the walls of the enclosure or by stomping...
January 9, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28066905/implications-of-genital-mutilation-at-autopsy
#11
Roger W Byard
Given the potential significance of mutilation of the external genitalia in medicolegal fatalities, a review of the literature was undertaken to identify subcategories. Such mutilations may have been sustained sometime before death, around the time of death, or after death. The most common type of ante mortem genital mutilations involves cultural practices such as male circumcision. Less common male mutilations such as subincisions are tribally based. Female genital mutilation is found particularly in African, Middle Eastern, or Asian populations...
January 9, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28066890/undocumented-border-crosser-deaths-in-arizona-expanding-intrastate-collaborative-efforts-in-identification
#12
Julie M Fleischman, Ashley E Kendell, Christen C Eggers, Laura C Fulginiti
Undocumented Border Crosser (UBC) deaths in Arizona are a major issue faced by medicolegal authorities. Currently, the Maricopa County Office of the Medical Examiner (MCOME) is in possession of over two hundred unidentified individuals, more than half of whom are presumed to be UBCs. The primary goal of this study was to address the growing number of UBC deaths in Maricopa County in order to provide a more comprehensive picture of this important anthropological issue within the state of Arizona. Of the 107 total UBC cases evaluated for the study, the majority were male and age estimates for all individuals were between 15 to 60 years old...
January 9, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28066883/a-novel-pixel-based-method-to-estimate-the-instantaneous-velocity-of-a-vehicle-from-cctv-images
#13
Shengxiong Liu, Xiuju Yang, Jianguo Cui, Zhiyong Yin
In traffic forensic identifications, it was usually unfavorable that estimated velocities of questioned vehicles derived from frame-based methods eventually turned out to be close to but a bit less than speed limits. In this paper, a novel pixel-based method was presented to estimate vehicles' relatively instantaneous velocities. First, two adjacent pixels' actual distance was acquired from the closed-circuit television (CCTV) images. Then, the instantaneous average velocity within this one frame interval time (FIT) was calculated out...
January 9, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28054339/a-set-of-handwriting-features-for-use-in-automated-writer-identification
#14
John J Miller, Robert Bradley Patterson, Donald T Gantz, Christopher P Saunders, Mark A Walch, JoAnn Buscaglia
A writer's biometric identity can be characterized through the distribution of physical feature measurements ("writer's profile"); a graph-based system that facilitates the quantification of these features is described. To accomplish this quantification, handwriting is segmented into basic graphical forms ("graphemes"), which are "skeletonized" to yield the graphical topology of the handwritten segment. The graph-based matching algorithm compares the graphemes first by their graphical topology and then by their geometric features...
January 5, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28032350/age-estimation-based-on-appearance-of-gray-hair-in-different-body-sites-of-sri-lankan-autopsy-cases
#15
Harshana Mahendra Kumara Senanayake, Nuwan Darshana Wickramasinghe
Owing to the scanty evidence on usefulness of information of appearance of gray hair for age estimation, this study was conducted to estimate age based on the appearance of gray hair on different body sites in a sample of autopsy cases in Sri Lanka. A descriptive cross-sectional study was conducted in Teaching Hospital-Kurunegala during 2011 to 2013. Based on the pattern of the presence of gray hair in different body sites, six stages of gray hair were computed. The analysis 1155 autopsy cases revealed strong, positive correlations between age and appearance of gray hair in head, mustache, beard, and pubic area among males and strong, positive correlations between age and the appearance of gray hair in head and pubic area among females (p < 0...
December 29, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28032349/obesity-body-mass-index-and-homicide
#16
Kimberley J Omond, Neil E I Langlois, Roger W Byard
The body mass indexes (BMIs) of 100 randomly selected homicide cases from the files of Forensic Science SA were compared to the Australian and South Australian populations. There were 70 males and 30 females (M:F = 2.3:1; age range 18-84 years; mean 42.3 years). There was a substantially lower proportion of obese individuals in the homicide population compared to the general Australian and South Australian populations (19% [vs.] 27.9% and 30%, respectively). A second group of 144 randomly selected autopsy cases where the BMI was ≥40 kg/m(2) was analyzed...
December 29, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28032347/quantifying-uncertainty-in-estimations-of-the-total-weight-of-drugs-in-groups-of-complex-matrices-using-the-welch-satterthwaite-equation
#17
Ivo Alberink, Annette Sprong, Annabel Bolck, Peter Vergeer
In this paper, a method is described to quantify estimations of the total amount of drugs in groups of seized items, including quantification of the precision. Previous work on this topic was based on the assumptions of normally distributed measurements and grouping of items with a common relative standard deviation. In practice, these assumptions are often violated, for example, for data with point masses at 0, or if certain items in a group have a very high standard deviation. The method described in this paper is based on work by Welch and Satterthwaite and does not assume constant relative standard deviations...
December 29, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28032334/scoring-of-decomposition-a-proposed-amendment-to-the-method-when-using-a-pig-model-for-human-studies
#18
Natalie Keough, Jolandie Myburgh, Maryna Steyn
Decomposition studies often use pigs as proxies for human cadavers. However, differences in decomposition sequences/rates relative to humans have not been scientifically examined. Descriptions of five main decomposition stages (humans) were developed and refined by Galloway and later by Megyesi. However, whether these changes/processes are alike in pigs is unclear. Any differences can have significant effects when pig models are used for human PMI estimation. This study compared human decomposition models to the changes observed in pigs...
December 29, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28028802/fatal-intoxication-with-%C3%AE-pvp-a-synthetic-cathinone-derivative
#19
Barbara Potocka-Banaś, Tomasz Janus, Sławomir Majdanik, Tomasz Banaś, Teresa Dembińska, Krzysztof Borowiak
This study presents the fatal case of a young man who was admitted to the ICAU due to sudden cardiac arrest. An interview revealed that the patient had taken some unspecified crystals. From the moment of admission, his condition deteriorated dramatically as a result of increasing circulatory insufficiency. After a few hours, sudden cardiac arrest occurred again and the patient was pronounced dead. In the course of a medicolegal autopsy, samples of biological material were preserved for toxicology tests and histopathological examination...
December 28, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28028800/sex-and-size-related-patterns-of-carrion-visitation-in-necrodes-littoralis-coleoptera-silphidae-and-creophilus-maxillosus-coleoptera-staphylinidae
#20
Anna Mądra-Bielewicz, Katarzyna Frątczak-Łagiewska, Szymon Matuszewski
The estimation of postmortem interval (PMI) based on successional patterns of adult insects is largely limited, due to the lack of potential PMI markers. Sex and size of adult insects could be easily used for such estimation. In this study, sex- and size-related patterns of carrion attendance by adult insects were analyzed in Necrodes littoralis (Coleoptera: Silphidae) and Creophilus maxillosus (Coleoptera: Staphylinidae). For both species, abundance of males and females changed similarly during decomposition...
December 28, 2016: Journal of Forensic Sciences
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