Postmortem interval estimation of human skeletonized remains through luminol chemiluminescence

Area of Science:

• Forensic Science
• Biochemistry
• Anthropology

Background:

• Estimating postmortem interval (PMI) with skeletal remains is challenging in forensic science.
• A rapid screening protocol is vital for identifying remains of forensic interest.
• Luminol chemiluminescence is a low-cost, time-efficient presumptive test.

Purpose of the Study:

• To evaluate the utility of luminol chemiluminescence for postmortem interval estimation.
• To expand on previous research regarding luminol's application in forensic contexts.
• To assess luminol's effectiveness as a presumptive test for human skeletal remains.

Main Methods:

• Utilized 239 human clavicles with known postmortem intervals.
• Applied luminol solution to powdered bone samples in a controlled dark environment.
• Measured chemiluminescence intensity using visual observation, photography, and a 5-level scale.

Main Results:

• Luminol chemiluminescence demonstrated high sensitivity in detecting recent postmortem intervals.
• The method proved effective as a presumptive test, reducing investigation time and costs.
• A notable incidence of false positives was observed, indicating limitations in specificity.

Conclusions:

• Luminol chemiluminescence is a valuable tool for initial screening and dating recent postmortem intervals.
• The method aids in identifying forensic relevant remains efficiently.
• Results suggest complementing luminol testing with additional methods for scientific validation due to its low specificity.