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Post-mortem Iris Decomposition and its Dynamics in Morgue Conditions.

Mateusz Trokielewicz¹, Adam Czajka², Piotr Maciejewicz³

¹Institute of Control and Computation, Warsaw University of Technology, Engineering Nowowiejska 15/19, Warsaw, 00-665, Poland.

Journal of Forensic Sciences

|June 23, 2020

Summary

This summary is machine-generated.

Iris patterns remain viable for forensic identification for over 400 hours postmortem. Near-infrared light imaging is recommended for cadaver eyes to overcome corneal opacity and aid in accurate identification.

Keywords:

biometrics decomposition eye iris recognition postmortem

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Area of Science:

Forensic Science
Biometrics
Ophthalmology

Background:

Increasing use of iris biometrics in forensic identification necessitates understanding postmortem changes.
Accurate postmortem identification is crucial for crime scene investigations and proper body disposition.

Purpose of the Study:

To analyze the effects of postmortem decomposition on the human iris for forensic identification.
To evaluate the utility of iris recognition as a forensic tool in identifying deceased individuals.

Main Methods:

Analysis of postmortem iris images from a subject over 34 days.
Acquisition of images in both visible and near-infrared (860 nm) light.
Examination of iris features and decomposition rates under morgue conditions.

Main Results:

Visible iris features suitable for human expert matching persist up to 407 hours postmortem.
Near-infrared illumination effectively mitigates corneal opacity in cadaver eyes.
Iris patterns show potential for identification even after extended postmortem intervals.

Conclusions:

Iris biometrics can be a valuable tool for postmortem identification in forensic investigations.
Near-infrared imaging is recommended for improved image quality and identification accuracy.
Guidelines for imaging, illumination, and resolution are provided to assist forensic examiners.