Publication Date
Spring 5-6-2026
School
School of Health Sciences
Major
Forensic Science
Keywords
DNA degradation, STR analysis, bloodstains
Disciplines
Forensic Biology | Laboratory and Basic Science Research
Recommended Citation
Walter, Nadia, "The Longevity of DNA from Bloodstains and Its Forensic Implications" (2026). Senior Honors Theses. 1598.
https://digitalcommons.liberty.edu/honors/1598
Abstract
Human DNA is valuable forensic evidence, helping to solve a wide range of cases. It is often sourced from biological fluids found at a scene such as blood, saliva, semen, and urine. Many different factors can influence the longevity of DNA sourced from bloodstains, including the type of substrate, storage conditions, and weather. The quality of a DNA sample from a bloodstain found at a crime scene may influence its admissibility in court.
Original research was done on a surgical table from the last major battle of the American Civil War, extracting DNA from latent bloodstains. Some full profiles were developed from the presumably 160-year-old DNA, demonstrating the longevity of viable DNA, which may be used to corroborate historical records or even solve cold cases.
