Stone I C
Physical Evidence Section, Institute of Forensic Sciences, Dallas, Texas 75235.
Am J Forensic Med Pathol. 1992 Dec;13(4):275-80. doi: 10.1097/00000433-199212000-00001.
Data from a total of 1,200 cases that the Medical Examiner of Dallas County, Texas, ruled as suicide with a firearm have been compared with the results of forensic laboratory examinations and tests; 75% are with handguns and 25% are with long guns. The incidence of suicides by gender yields 82% males and 18% females, with the most common entrance site being the head. With regard to racial distribution of persons committing suicide, > 88% are white in the study population group, which is 76% white. Data are presented for the incidence of blood detected inside and on the muzzle end of the barrel of the firearm, and for the persistence of blood inside the barrel even after the weapon was discharged to obtain test bullets. The analysis of handwipings for primer residues shows that "positive" results are obtained for approximately 50% of the revolvers and approximately 32% of the pistols when the caliber is > 22. Other projects such as transfer of gunshot residues to the hand by simply handling the weapon, the incidence of single-contact wounds in homicide versus suicide cases, and the percent of positive identification of bullets with weapons submitted are described.
德克萨斯州达拉斯县法医判定为持枪自杀的总计1200例案件的数据，已与法医实验室检查和测试结果进行了比较；其中75%使用手枪，25%使用长枪。按性别划分的自杀发生率为男性82%，女性18%，最常见的入口部位是头部。关于自杀者的种族分布，研究人群组中超过88%为白人，而该地区白人占76%。文中给出了枪支枪管内部和枪口端检测到血液的发生率，以及即使在开枪获取测试子弹后枪管内血液的残留情况。对擦拭物进行引物残留分析表明，当口径大于22时，约50%的左轮手枪和约32%的手枪会得到“阳性”结果。还描述了其他项目，如仅通过操作武器将枪击残留物转移到手上、杀人案件与自杀案件中单发接触性伤口的发生率，以及提交的子弹与武器的阳性识别百分比。
