Does a draft really influence postmortem body cooling?

Area of Science:

• Forensic Pathology
• Postmortem Physiology

Background:

• Accurate estimation of the time of death (TOD) is crucial in forensic investigations.
• Body temperature measurement is a precise method for initial postmortem period TOD determination.

Purpose of the Study:

• To investigate the influence of room airflow on the body cooling process.
• To assess the impact of airflow on the accuracy of time of death estimation.

Main Methods:

• Experiments were conducted on pigs to record postmortem temperatures.
• Temperature measurements were taken at the eye, muscles, and rectum.
• The experiment compared cooling rates in still air versus generated airflow conditions.

Main Results:

• Moderate airflow in the room did not significantly affect the cooling rate of body sites.
• Air movement near the pigs' bodies remained minimal despite generated drafts.
• Subjective assessment of drafts is unreliable for TOD calculations.

Conclusions:

• Room airflow has a negligible effect on postmortem cooling under tested conditions.
• Precise TOD estimation requires objective measurement of air velocity near the body.
• Avoid using subjective draft sensations and corrective coefficients for TOD calculations.