The Persistence Study of Copper on Bullet Wipe on Fabric by Dithiooxamide Test

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Nich Wongsongja
Angkana Jaroenporn
Sittisak Paenthaisong
Benjasine Laowongsee

Abstract

Firearms are often used as a part of crimes, leaving evidence at the scene such as firearms, cartridge case, bullet, and ammunition. After firing, gunshot residue as well as traces of bullet wipe holes from both unjacketed bullet and jacketed bullet remain. Copper is often used in the production of jacketed bullet, and the presence of copper-bearing material in bullet wipe. This research studied the persistence of copper-bearing material in bullet wipe on 100% cotton in different sampling periods: immediately after firing and shooting, 1, 6, 12, 24, 48, 72 hours, 1 week and 1 month by dithiooxamide test. The semi-automatic firearms of .45 caliber GLOCK 21 and .45 ACP ammunition at the lead in the 20 inch firing range was used in this experiment. The results showed the average size of the bullet holes was about 11.4 × 5.9 mm. and the average size of the black edges around the bullet holes was about 12.8 × 11.3 mm. Dithiooxamide test method showed a positive reaction appeared.

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How to Cite
Wongsongja, N., Jaroenporn, A., Paenthaisong, S., & Laowongsee, B. (2021). The Persistence Study of Copper on Bullet Wipe on Fabric by Dithiooxamide Test. Journal of Criminology and Forensic Science, 7(1), 163-173. Retrieved from https://so02.tci-thaijo.org/index.php/forensic/article/view/245914
Section
Research Articles

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