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Related Experiment Videos

An alternate light source to detect semen.

David G Nelson1, Karen A Santucci

  • 1Brown University School of Medicine, Department of Pediatrics, Section of Pediatric Medicine, Hasbro Children's Hospital, Providence, RI, USA.

Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine
|October 3, 2002
PubMed
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Physicians can now identify semen using an alternate light source (ALS) in sexual assault cases. Training significantly improved their ability to differentiate semen from other substances with the ALS.

Area of Science:

  • Forensic Science
  • Medical Diagnostics

Background:

  • The Wood's lamp (WL) is insufficient for identifying semen in sexual assault evaluations.
  • Physicians struggle to differentiate semen from other substances using a WL.

Purpose of the Study:

  • To assess if an alternate light source (ALS) can differentiate semen from other products.
  • To determine if training enhances physicians' ability to differentiate semen using an ALS.

Main Methods:

  • An ALS (Bluemaxx BM500) was used to test semen fluorescence.
  • Physicians attempted to identify semen before and after ALS training.

Main Results:

  • Initially, 25% of physicians differentiated semen from other products using the ALS.
  • After training, 83% could differentiate semen, with the ALS showing 100% sensitivity.

Related Experiment Videos

  • Commonly mistaken products included hand cream, Castille soap, and bacitracin.

    • Conclusions:

    • Physicians can identify and differentiate semen using an ALS after training.
    • The ALS is a sensitive tool for semen detection in forensic evaluations.