ISSN: 0022-1198
CODEN: JFSCA
Published Online: 10 March 2004
Page Count: 6

A Method for Impregnating Nylon Transfer Membranes with Leucocrystal Violet for Enhancing and Lifting Bloody Impressions
Michaud, AL
Federal Bureau of Investigation, VA

Brun-Conti, L
Bureau of Alcohol, Tobacco, Firearms, and Explosives, MD

(Received 4 June 2003; accepted 10 January 2004)

Abstract

The objective of this research project was to demonstrate a quick and easy method for impregnating nylon transfer membranes with leucocrystal violet (LCV) for the purpose of lifting and enhancing impressions made in blood. A stamp that would simulate fine detail found in fingerprints or footwear was used to create impressions on a variety of substrates. Four different LCV formulations were tested to determine the effectiveness of the prepared membranes in lifting and enhancing the impressions. Further investigation involved the feasibility of using the LCV membranes in the field by studying the shelf life and storage of the impregnated membranes and the longevity of the lifted impressions. One of the formulations studied demonstrated superior lifting and enhancing capabilities, as well as a prolonged shelf life and a resilience of the lifted impressions, thus proving LCV to be an extremely valuable technique.

Keywords:
forensic science, bloody impressions, bloody impression lifters, leucocrystal violet (LCV), nylon transfer membranes

Paper ID: JFS2003195
DOI: 10.1520/JFS2003195
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