Forensic fibers can survive underwater for much longer than previously thought -- which could help criminal investigators uncover vital evidence. New research has found that fiber evidence can survive on fabrics underwater for several weeks.
Forensic fibres can survive underwater for much longer than previously thought -- which could help criminal investigators uncover vital evidence.
"However, if items have been submerged in water for more than seven days then many forensic examiners believe that any valuable trace evidence will be gone and won't seek it out." This study used artificial streams, known as mesocosms, to investigate the persistence rate of polyester fibres on different fabric types over a four-week exposure time.Usually used for ecological research, this is the first time that mesocosms have been employed to look at forensic evidence.
PhD researcher Afsané Kruszelnicki said:"It would be expected that a higher flow rate would have a lower number of retained fibres compared to a lower flow rate, yet no significant difference was seen in all but one condition. "The study also highlights the benefits of using mesocosms which mimic realistic aquatic environments in a controlled setting. This is the first time that mesocosms have been used to look at forensic evidence and we hope it will pave the way for further studies to investigate different types of trace evidence such as gunshot residue, pollen, fingerprints or DNA."
An investigation into the use of riverine mesocosms to analyse the effect of flow velocity and recipient textiles on forensic fibre persistence studiesResearchers have demonstrated a prototype lidar system that uses quantum detection technology to acquire 3D images while submerged underwater. The high sensitivity of this system could allow it to ...
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