Statistical Approach Based on Accumulated Degree-Days to Predict Decomposition-Related Processes in Forensic Studies

• NCJ Number: 233683
• Journal: Journal of Forensic Sciences Volume: 56 Issue: 1 Dated: January 2011 Pages: 229-232
• Author(s): Jean-Philippe Michaud, M.Sc.; Gaetan Moreau, Ph.D.
• Date Published: January 2011
• Length: 4 pages
• Publication Format: Article
• Publication Type: Report (Study/Research)
• Language: English
• Country: United States of America

Annotation

This study examined the relationship between decomposition stages and degree-day accumulation using pig carcasses.

Abstract

Using pig carcasses exposed over 3 years in rural fields during spring, summer, and fall, we studied the relationship between decomposition stages and degree-day accumulation (i) to verify the predictability of the decomposition stages used in forensic entomology to document carcass decomposition and (ii) to build a degree-day accumulation model applicable to various decomposition-related processes. Results indicate that the decomposition stages can be predicted with accuracy from temperature records and that a reliable degree-day index can be developed to study decomposition-related processes. The development of degree-day indices opens new doors for researchers and allows for the application of inferential tools unaffected by climatic variability, as well as for the inclusion of statistics in a science that is primarily descriptive and in need of validation methods in courtroom proceedings. (Published Abstract) Figure and references