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ABSTRACT

W. Jerry Chisum, BS1; Brent E. Turvey, MS2

Title: "Evidence Dynamics: Locard's Exchange Principle & Crime Reconstruction"

Reference: Chisum, W.J., & Turvey, B. "Evidence Dynamics: Locard's Exchange Principle & Crime Reconstruction," Journal of Behavioral Profiling, January, 2000, Vol. 1, No. 1

Abstract: Conclusions regarding the circumstances and behaviors elicited from the physical evidence related to a crime (crime reconstruction) can infrequently be housed within the confines of absolute certainty. This paper discusses the development of Locard's Exchange Principle and historical and contemporary philosophies surrounding crime reconstruction. It further discusses the fallacy of assuming the integrity of physical evidence, and provides a logical foundation for the concept of Evidence Dynamics. Evidence Dynamics refers to any influence that changes, relocates, obscures, or obliterates physical evidence, regardless of intent. Evidence Dynamics, it is further argued, come into play during the interval that begins as evidence is being transferred, and ends when the case is ultimately adjudicated. A discussion of the various types of Evidence Dynamics is provided, followed up by demonstrative examples from the authors' case files.


1W. Jerry Chisum has been a criminalist since 1960. In October of 1998, he retired from 30 years of service with the California Department of Justice into private practice. He is currently serving as Vice-President of the Academy of Behavioral Profiling, and is a member of their Board of Directors. He can be reached for comment or consultation by contacting: URL: www.ncit.com; jchisum@profiling.org

2Brent E. Turvey, MS is a forensic scientist, criminal profiler, and a full partner of Knowledge Solutions, LLC. He is currently serving as Secretary of the Academy of Behavioral Profiling, and is a member of their Board of Directors. He can be reached for comment, consultation or reprints of this article by contacting: Knowledge Solutions, 1961 Main St., PMB 221, Watsonville, CA 95076; Phone (831)786-9238; bturvey@corpus-delicti.com.

 

Journal of Behavioral Profiling: Volume 1, Number 1, January 2000
2000 Journal of Behavioral Profiling, www.profiling.org/journal; All rights reserved.
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