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In the criminal cases of driving under the influence (DUI), DNA evidence can be collectedfrom the deployed airbag of the motor vehicle and submitted to the crime lab for touch DNA analysis.The evidence can be acquired when the skin cells are observed on the surface of the airbag in a trafficaccident. However, the low quantity or quality of the evidence collected from a crime scene preventsfurther identification analysis in many cases. In the current study, we reported a case of identifyingtouch DNA extraction from the shed skin cells from the deployed airbag of a motor vehicle. We man-aged to collect DNA evidence from the shed skin cells in an airbag using a proper approach of collec-tion and extraction. The 5.87 ng of extracted DNA was sufficient for genotyping and forensic identifica-tion, which helped to identify the driver of the car in collision with a pier in the street. In DUI casesand other traffic accidents, therefore, the amount of touch DNA extracted from the deployed airbag canbe sufficient for DNA marker genotyping and further analysis. 相似文献
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Amy V. Rapkiewicz M.D. Mark J. Shuman M.D. Kenneth D. Hutchins M.D. 《Journal of forensic sciences》2014,59(1):268-270
Celebratory gunfire injuries from “falling bullets” occur when guns are fired into the air during celebrations without realizing that this can cause serious injuries or even fatalities. Fatal celebratory gunfire injury is an uncommonly reported event in the continental United States. Our electronic database was queried for homicides occurring within days of July 4th and December 31st over a 14‐year period. We describe two cases of fatal gunfire injury due to celebratory gunfire occurring during New Year's Eve in Southern Florida. The relevant literature is reviewed. These case reports illustrate that fatal gunfire injuries sustained from “falling bullets” may pose as an unexpected mimic to sudden natural deaths especially in patients with prior medical history. A high index of suspicion to recognize such injury is required particularly during holidays. 相似文献
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Christian Crowder Ph.D. Christopher W. Rainwater M.S. Jeannette S. Fridie M.A. 《Journal of forensic sciences》2013,58(5):1119-1126
Sharp force trauma research lacks agreement on reported error rates for correctly identifying toolmark characteristics on bone and cartilage. This study provides error rates for determining blade class (serrated, partially serrated, nonserrated) and type of edge bevel (left, right, even). Three analysts examined cuts to a wax medium, cartilage, and bone using two types of microscopes. Additionally, the observers examined impressions taken from the wax medium and the cartilage. Overall, a total of 504 observations were performed. Serrated blades were distinguishable from nonserrated blades due to their patterned striations. Some difficulties were encountered in distinguishing serrated and partially serrated blades; however, when these groups were considered together as one classification type (serrated), classification accuracy improved from 79% to 96%. Classification accuracy for edge bevel was 65%. Error rates were similar when comparing direct observation of the cut marks versus indirect observation (impressions). Additionally, the type of microscope used did not affect error rates. 相似文献
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目的应用实时定量PCR技术检测大鼠骨骼肌挫伤后细胞中性氨基酸载体ASCT2 mRNA表达,分析其与挫伤时间的关系。方法建立大鼠骨骼肌挫伤模型,分别取伤后4、8、12、16、20、24、28、32 h及对照组检材。提取总RNA,逆转录合成第一链的cDNA,以RPL13为内参基因进行荧光定量检测,采用2-△△Ct法比较其与对照组肌肉组织中ASCT2 mRNA的相对表达量。结果损伤组肌肉组织中ASCT2 mRNA在挫伤后12、16h表达量分别为对照组的196.40%和189.15%,损伤后4、8、20、24、28、32h ASCT2 mRNA表达量与对照组相比无统计学差异(P>0.05),说明ASCT2 mRNA在损伤12~16h其表达量较正常组及其他损伤时间组要高,而在损伤20h以后ASCT2 mRNA表达量又降至正常水平。结论大鼠骨骼肌挫伤后32h之内ASCT2 mRNA的表达有一定的时间规律性,可望作为推断骨骼肌损伤时间的指标之一。 相似文献
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Dennis J. Chute M.D. Kia Newman M.D. Robert J. Bready M.S. Eric D. Benjamin AEMT‐P 《Journal of forensic sciences》2017,62(5):1386-1388
Migrating bullets are rare sequelae of penetrating gunshot wounds. Such cases have been described in the neurosurgical literature because they can produce complications in the management of patients such as decline in neurologic status, delays in rehabilitation, and difficulties in bullet removal. In contrast, few postmortem reports have described this phenomenon. We report a case of a gunshot wound in which the projectile entered the left side of the head and traversed to the right frontal area as documented by CT scan on hospital admission. At autopsy, the bullet was noted to have migrated back to the left side of the head from where it was recovered. Medical examiners need to be aware of this unusual phenomenon of retained intracranial projectiles. 相似文献
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Characteristics of Bone Injuries Resulting from Knife Wounds Incised with Different Forces
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Caitlin Humphrey B.Hlth.Sc. Jaliya Kumaratilake Ph.D. Maciej Henneberg Ph.D. D.Sc. 《Journal of forensic sciences》2017,62(6):1445-1451
The aim of this research was to experimentally determine the characteristics of incised bone wounds, which are commonly found in defense injuries. A specially constructed pivoting arm device was used to inflict wounds with controlled forces and direction. Five knives were selected to inflict the wounds on porcine forelimbs. Eight incised wounds were made per knife per force. A larger knife and a greater force caused longer and wider bone wounds. Comparisons of individual knives at the two forces produced varying results in the bone wounds. A correlation was seen between the force and the length (r = 0.69), width (r = 0.63), and depth (r = 0.57) of bone wounds. Serrated‐edge and nonserrated knives can be distinguished from the appearance of the wound. The outcomes may be applicable in forensic investigations to ascertain the forces associated with incised wounds and identify the specific knife used. 相似文献