Identification of human remains using Rapid DNA analysis.

Area of Science:

• Forensic Science
• Genetics
• Biotechnology

Background:

• Rapid identification of human remains is critical for disaster victim identification and forensic casework.
• Sample degradation due to environmental exposure and postmortem interval complicates DNA analysis.
• Forensic laboratories face challenges with sample processing capacity and quality following mass disasters.

Purpose of the Study:

• To evaluate the efficacy of a Rapid DNA identification system across various human tissue types under different postmortem conditions.
• To determine optimal sample types for DNA identification from exposed and refrigerated human remains.

Main Methods:

• Utilized a fully automated, field-forward Rapid DNA identification system for sample processing and data interpretation (under 2 hours).
• Tested multiple tissue types (buccal, muscle, liver, brain, tooth, bone) from human remains subjected to above-ground exposure and refrigerated storage.
• Assessed DNA profile quality over extended periods (up to 1 year for exposed, 3 months for refrigerated).

Main Results:

• For exposed remains, buccal swabs yielded excellent DNA identification results for up to 11 days.
• Bone and tooth samples provided high-quality DNA profiles from exposed remains throughout the 1-year study duration.
• All tested tissue types from refrigerated remains produced excellent DNA identification profiles over a 3-month period.

Conclusions:

• The Rapid DNA identification system is effective for various tissue types in mass disaster scenarios.
• Bone and tooth samples are robust choices for long-term identification of exposed remains.
• Buccal swabs are suitable for short-term identification of exposed remains, and all tested tissues are viable for refrigerated remains.