A method for impregnating nylon transfer membranes with leucocrystal violet for enhancing and lifting bloody impressions.
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 formations 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.
Michaud
Amy L
AL
Federal Bureau of Investigation, 2501 Investigation Parkway, FBI Academy Complex, Quantico, VA 22135, USA.
Brun-Conti
Leanora
L
D001769:Blood; D001801:Blood Stains; D003878:Dermatoglyphics; D005240:Feasibility Studies; D005456:Fluorescent Dyes / Q000737:chemistry*; D005554:Forensic Medicine / Q000379:methods; D005840:Gentian Violet / Q000031:analogs & derivatives* / Q000737:chemistry*; D006801:Humans; D008567:Membranes, Artificial; D009757:Nylons; D012408:Rubber; D012867:Skin; D013499:Surface Properties
D005456:Fluorescent Dyes; D008567:Membranes, Artificial; D009757:Nylons; C475159:leucocrystal violet; D012408:Rubber; D005840:Gentian Violet