利用剪切痕迹特征推断剪切工具.pdf

剐事技术 2015年 第40卷 第4期 ForensicScienceandTechnology ·技术与应用 · DOI：10．16467~．1008—3650．2015．04．005 利用剪切痕迹特征推断剪切工具 崔 军，杨宇波，王泳辉，孙建军 (广州铁路公安局司法鉴定中心，广州 510088) DeterminationoftheSuspectToolbyComparingtheImpressed andStriatedM arksLeftontheCuttingSurface CUIJun，YANGYubo，WANGYonghui，SUNJianjun(InstituteofForensicScience,GuangzhouRailwayPublicSecurityBu— reau,Guangzhou5lO08KChina) ABATRACT：Inthecaseinvestigationwithtoolmarks．itiSveryimportanttoanalyzethefeaturesoftheimpressedorstriated markwiththepurposetodeterminetheclass．brandandmodelofthesuspecttoo1．A successfulanalysisoftoolmarksrelated toarailwaydamagecaseisintroducedinthispaper,inwhichtheclass，brandandmodelofsuspecttoolwereidentifiedby themanufacturingfeatures．Basedoncuttingfeaturesof28brokenendsofrebar／steelwirefoundinthecrimescene．the preliminarydeductionwasmadethatthecuttingtoolwasaboltcutter．Byexaminingtheinclinationintwosidesofbroken endsandthelinearkerfsofthebulge，thespecialmanufacturingfeaturesonthetopandedgeofthebladeofsuspecttool wereidentified．27brandsofboltcurerwerecollectedfrom thelocalmarketandexaminedinthelaboratory．The “Shunli” brandofboltcutterwasfoundtohavethesamemanufacturingfeaturesasthoseofthesuspecttoo1．Tofurtherconfirm the relativestabilityandindividualityofthemanufacturingfeaturesrevealedbythesampleboltcutter,aninvestigation into themanufacturingprocessofthetype350，450，600，750，1050of “shunli”boltcutterswascarriedout，andtheindividual characteristicsoftype450matchedthesuspecttoolperfectly．Thesuspectwasconvicted，andatype450ofboltcutterwas recovered．whichwasconfimr edtoberesponsibletothemarkinthecrimescene． KEYW ORDS：toolmarks；features；millingstriation；boltcutter 摘要 ：通过对特定案件现场遗留的剪切痕迹检验确定剪切工具的种类、品牌和型号。根据现场遗留的28个剪 切断头反映的刃 口特征确定剪切工具为断线钳 ；对剪切面和立项上的线条状印压痕进行检验，确定作案断线钳 刃顶和刃侧的特殊加工花纹特征 ；对案发附近区域销售的27个品牌断线钳的刀片加工花纹特征进行取样排查， 初步锁定作案工具为 “顺利”牌450型断线钳