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Wiesbaden, Germany

Butler J.M.,U.S. National Institute of Standards and Technology | (Becky) Hill C.R.,U.S. National Institute of Standards and Technology | Kline M.C.,U.S. National Institute of Standards and Technology | Bastisch I.,Bundeskriminalamt BKA | And 3 more authors.
Forensic Science International: Genetics Supplement Series

U.S. population sample sets have been tested at the SE33 locus with PowerPlex ESX 17 and ESI 17 as well as AmpFlSTR NGM SElect, Investigator ESSplex SE, and the widely used "Polymeropoulos" primers to explore any concordance issues between kits possessing primers in different positions. A G→A mutation 68. bp downstream of the repeat region has been detected in several samples that can cause a mobility shift in PowerPlex ESI 17 and ESSplex SE relative to PowerPlex ESX 17 and NGM SElect SE33 alleles. In addition, a C→T mutation 60. bp downstream of the repeat region created the same mobility shift and allele dropout with the ESX 17 kit. © 2011 . Source

Haag L.C.,Forensic Science Services | Niewohner L.,Bundeskriminalamt BKA | Latzel S.,Bundeskriminalamt BKA
AFTE Journal

Tracer bullets have been in existence since the First World War and are presently in use in at least three common forms in military ammunition with the particular form related to the intended use of the ammunition. Tracer ammunition also exists in many forms and compositions in centerfire pistol cartridges all the way down to the diminutive 22 long rifle rimfire cartridge. Such ammunition may occasionally be involved or suspected in both criminal and civil shooting incidents with the latter usually being associated with the starting of wildfires. This article reviews the more common construction and compositions of modern tracer bullets and addresses the matter of discriminating and/or identifying bullet holes in clothing and other objects made by tracer bullets through the use of scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and elemental mapping. © 2014, Copyright Association of Firearm and Tool Mark Examiners-April. Source

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