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Postmortem Changes in Animal Carcasses and Estimation of the Postmortem Interval.

¹Animal Diagnostic Laboratory, Department of Veterinary and Biomedical Sciences, College of Agricultural Sciences, The Pennsylvania State University, University Park, PA jwb21@psu.edu.

Veterinary Pathology

|March 6, 2016

Summary

Estimating the postmortem interval (PMI) is crucial for death investigations but remains challenging. Current methods for determining time since death have limitations, necessitating careful consideration of various factors.

Keywords:

algor mortis decomposition livor mortis postmortem changes postmortem interval rigor mortis taphonomy time since death

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Area of Science:

Forensic Pathology
Postmortem Changes
Forensic Science

Background:

Accurate interpretation of autopsy findings relies on understanding postmortem changes.
Estimating the postmortem interval (PMI) is vital in forensic investigations for both humans and animals.

Purpose of the Study:

To review methods for estimating the postmortem interval.
To highlight the challenges and limitations in current PMI estimation techniques.

Main Methods:

Review of various methods including gross and microscopic changes, temperature-based techniques, postmortem chemistry, molecular methods, microbial assays, ocular changes, radiography, and entomology.
Discussion of factors influencing postmortem changes and PMI estimation accuracy.

Main Results:

No single method reliably estimates the time of death.
Accuracy of PMI estimation decreases as the postmortem interval increases.
Extrapolation of human data to animal cases requires caution.

Conclusions:

Accurate PMI estimation is complex, influenced by numerous factors.
Future research is needed to develop more accurate techniques for PMI estimation.
Improved PMI estimation methods will benefit both human and veterinary forensic investigations.