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Safeguarding forensic DNA reference samples with nullomer barcodes.

Jayita Goswami¹, Michael C Davis, Tim Andersen

¹Department of Biology, Boise State University, Science-215, 1910 University Dr., Boise, ID 83725-1515, USA.

Journal of Forensic and Legal Medicine

|June 13, 2013

Summary

This summary is machine-generated.

Forensic DNA analysis can be compromised by sample contamination. This study introduces nullomer barcodes as internal controls for reference samples, ensuring accurate DNA source identification and enhancing forensic data integrity.

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Area of Science:

Forensic Science
Molecular Biology
Genetics

Background:

Contamination of forensic DNA samples is a significant concern.
Current protocols lack methods to detect mislabeled reference samples or contamination of evidence samples.
Public trust in crime laboratories is impacted by DNA sample integrity concerns.

Purpose of the Study:

To develop a method for distinguishing reference DNA samples from evidence samples.
To introduce an internal amplification control for forensic reference samples.
To enhance the reliability and security of DNA analysis in forensic laboratories.

Main Methods:

Developed nullomer barcodes using DNA sequences absent or rare in public databases.
Incorporated nullomer tags into sample collection devices (FTA paper).
Tested the compatibility of nullomer tags with existing forensic typing and quantification kits.

Main Results:

Nullomer barcodes successfully tagged reference samples.
Detection of the barcode confirms the DNA originated from a reference sample.
Nullomer tags did not interfere with genotyping or quantification results.
Tags remained detectable even when diluted one million-fold and transferred to a knife.

Conclusions:

Nullomer barcodes provide a reliable internal control for forensic reference samples.
This method enhances the ability to identify sample origin and detect contamination.
The technique supports recommendations for improved quality control in forensic science.