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NCJRS Abstract

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NCJ Number: 221353 Add to Shopping cart Find in a Library
Title: Identification Through Typing of DNA Recovered From Touch Transfer Evidence: Parameters Affecting Yield of Recovered Human DNA
Journal: Journal of Forensic Identification  Volume:58  Issue:1  Dated:January/February 2008  Pages:33-41
Author(s): Robert W. Allen; Jill Pogemiller; Janice Joslin; Melisa Gulick; Jane Pritchard
Date Published: January 2008
Page Count: 9
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: The purpose of this study was to investigate the parameters affecting the recovery of human chromosomal DNA from touched evidence suitable for subsequent DNA typing.
Abstract: The study demonstrates that some or the entire DNA profile may be produced from DNA recovered from touch evidence from about 80 percent of the general population (i.e., 18.6 percent heavy shedders plus 60.5 percent intermediate shedders). In both sexes, only about 20 percent of donors were classified as light shedders. Among the arsenal of probative forensic tools available for the investigation of crime, fingerprinting is still one of the most effective means of linking individuals to crime scenes. However, for effective fingerprint matching to occur, the quality of a fingerprint lifted from evidence must meet minimal criteria before it can be compared with a reference print from a suspect. If the fingerprint is smudged or otherwise lacking in sufficient detail, it may not be useful for pattern comparison, but may still be suitable for DNA analysis. This study examined factors affecting the deposition of DNA on touched evidence. Volunteers of both sexes were asked to deposit a single fingerprint or thumbprint on clean glass slides with the forefingers and thumbs of both hands. They were also asked to identify their dominant hand. The study highlights the utility of touch evidence as a source of DNA suitable for typing from evidence that may be unsuitable for traditional fingerprint analysis. Tables, figures, references
Main Term(s): DNA fingerprinting
Index Term(s): Evidence identification; Fingerprint detection techniques; Fingerprint image quality; Fingerprints; Forensic sciences; Latent fingerprints; Suspect identification
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