New DNA test to identify suspects may solve crimes faster
What's the story
A groundbreaking study conducted by researchers at Flinders University, Australia, has revealed a potential new method for measuring DNA shedding. This innovative technique could significantly aid in criminal investigations. The research involved testing a unique forensic approach of cell staining on 100 volunteers, to determine how individuals shed varying levels of DNA, from very low to high.
Research implications
Study findings could expedite criminal investigations
The study found that 98 out of the 100 participants demonstrated consistent and reproducible cell number deposition. This indicates that individuals shed the same cells 'no matter when' samples are collected. The research aims to develop a robust, simple, and affordable test to determine a suspect's 'shedder status.' This could potentially expedite criminal investigations and minimize the risk of conflicting DNA evidence.
Gender differences
Males shed more DNA
The study also discovered gender differences in DNA shedding. Professor Adrian Linacre from the College of Science and Engineering at Flinders University stated, "Our latest study also shows that males are more prolific at shedding in general, depositing more cells per square millimeter than females." Additionally, the research found no difference in cell deposition between right and left thumbs.
Consistency observed
Shedder status remains constant post-handwashing
The research, published in the journal Forensic Science International Genetics, also found that an individual's shedder status remains consistent 30 minutes after handwashing. This suggests that DNA shedding is a continuous process. However, the study emphasized the need for further inter-laboratory trials to assess whether cell scoring between individuals and institutes records people consistently in terms of their shedder type.
Test development
No universal test to determine a person's shedder type
Currently, there is no universally accepted test to determine a person's shedder type. The study suggests that only through large-scale sampling and considering as many factors as possible, can a recommended shedder test be developed. "Depending on what type of 'shedder' a person is, confirmation of their shedder status can guide investigators," explained Linacre.