Development and application of a new nose hairs sample collection device for GSR Particles by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS)

Forensic Science International : Synergy
Luis Chávez ReyesFabiola Jamett Díaz

Abstract

When a firearm is discharged, a gaseous cloud containing characteristic particles of gunshot residue (GSR) are released forward and behind at high speed, depositing on clothing, hands, face and hair, as well as being inhaled and therefore retained in the nostrils of the person who fired the weapon. GSRs have characteristic sizes and morphologies and consist of a combination of lead, antimony and barium, as well as other elements. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) is a widely accepted technique for the analysis of these residues; however, little has been reported on samples taken from the nostrils of the suspect that discharged the shot. The analysis of residues found on hands has been more frequent. This article presents a device (Nasal Stub) developed by us for the non-invasive collection of GSR particles from the nostrils and a platform also developed by us to contain these devices that is compatible with SEM-EDS. To evaluate the effectiveness of our Nasal Stub to collect GSR particles from nose hairs, four types of firearms of different calibers were utilized. Nasal samples were collected at 0, 2, 4, 6, 8, and 20h after firing. The results show that the nasal device was able to ...Continue Reading

Citations

Jan 2, 2021·Forensic Science International : Synergy·Sébastien CharlesBart Nys
Jan 26, 2021·Journal of Forensic Sciences·Ramazan AkçanAli Rıza Tümer
Feb 3, 2022·The Medico-legal Journal·Alok AtreyaSavita Lasrado

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