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Related Experiment Video

Updated: May 1, 2026

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Spectrometric evaluation of post-mortem optical skin changes.

Vera Sterzik1, Lioudmila Belenkaia, Andreas W Liehr

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Summary
This summary is machine-generated.

Changes in human skin

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Area of Science:

  • Forensic Science
  • Biophysics
  • Dermatology

Background:

  • Human skin's optical properties involve light-scattering and light-absorbing components.
  • These properties change post-mortem due to tissue degradation.
  • Reflectance spectra offer insights into these changes.

Purpose of the Study:

  • To investigate the characteristic changes in skin reflectance spectra over the post-mortem interval.
  • To develop an algorithm for calculating the post-mortem interval using reflectance spectrometry.

Main Methods:

  • Collected 532 reflectance spectrometric measurements from 195 deceased individuals.
  • Analyzed changes in spectral peaks (scattering) and dips (absorption).
  • Developed an algorithm based on reflectance spectrometric extrema.

Main Results:

  • Documented characteristic alterations in skin reflectance spectra post-mortem.
  • Established a correlation between spectral changes and post-mortem interval progression.
  • Successfully developed a novel algorithm for post-mortem interval estimation.

Conclusions:

  • Skin's optical properties, specifically reflectance spectra, provide a quantifiable method for determining post-mortem interval.
  • The developed algorithm offers a promising tool for forensic investigations.
  • Reflectance spectrometry is a viable technique for assessing post-mortem changes in human skin.