NCJ Number
191262
Journal
Journal of Forensic Identification Volume: 51 Issue: 4 Dated: July/August 2001 Pages: 385-393
Date Published
2001
Length
9 pages
Annotation
This article describes the methodology and findings of an experiment in which fingerprints were deposited on a number of surfaces for the purpose of determining the KrimeSite Scope's ability to detect fresh and aged untreated latent fingerprints.
Abstract
Sirchie has introduced to the commercial market a reflected ultraviolet imaging system (RUVIS) product called KrimeSite, which enables a crime-scene investigator to locate latent fingerprints without pretreatment with powder or chemical developers. The unique utility of the KrimeSite Scope is the real-time imaging of crime scene situations, since less than 1 second is needed for exposure time. Various modes allow the prints to be captured on either photographic film or video display. The use of shortwave UV light allows the KrimeSite Scope to record untreated fingerprints over various nonporous surfaces. The surfaces used in the current experiment were high-gloss ceramic tile, matte-finish ceramic tile, white china plate, a polished stainless steel spoon, wood with a light coating of varnish, a semi-translucent plastic bowl, smooth and textured drinking glasses and clear plastic, and flat semi-gloss and high-gloss painted surfaces. The experiment found that optimum results were obtainable from the smooth, nonporous surfaces. The technique was not amenable to detecting fingerprints on porous surfaces. The relative position of the 4 watt UV light source to the latent print was critical to the detection of latent prints on some surfaces, thus making it likely that operation of the KrimeSite Scope requires two persons, one to control the viewer and the other to hold the UV source; however, this requirements was not applicable with the 30-watt UV light. By positioning this light source 6 to 10 feet from the target surface, the angle of incidence was not a factor. 2 figures and 4 references