Use of a 3-D Laser Scanner to Document Ephemeral Evidence at Crime Scenes and Postmortem Examinations

• NCJ Number: 239638
• Journal: Journal of Forensic Sciences Volume: 57 Issue: 1 Dated: January 2012 Pages: 188-191
• Author(s): Debra A. Komar, Ph.D.; Stephanie Davy-Jow, Ph.D.; Summer J. Decker, Ph.D.
• Date Published: January 2012
• Length: 4 pages
• Publication Format: Article
• Publication Type: Research (Applied/Empirical)
• Language: English
• Country: United States of America

Annotation

This paper discusses the use of 3-D laser scanning as a supplement to standard documentation.

Abstract

Proper documentation of physical evidence at both crimes scenes and postmortem examination is crucial for downstream analysis, interpretation, and presentation in court. Ephemeral or transient evidence poses particular challenges to investigators, as its very nature renders it difficult or impossible to seize and maintain in its original physical state. The use of a hand-held three-dimensional (3-D) laser scanner is proposed to capture and document such evidence, both in the field and at autopsy. Advantages of the scanner over traditional means of documentation such as photography or casting include the ability to obtain measurements in all dimensions, the ability to reconstruct missing elements, and the ease with which generated images can be interpreted by the jury at trial. Potential scenarios warranting the use of the scanner are identified, and the limitations of its use are discussed. Published by arrangement with John Wiley & Sons.