A body is found with well-developed rigor mortis in all muscle groups. Temperature of the body is 27°C in an ambient temperature of 22°C. Using the Henssge nomogram and assuming a standard body weight of 70 kg, the estimated time since death (TSD) would be approximately:
- A 2–4 hours
- B 10–15 hours ✓
- C 5–7 hours
- D 18–24 hours
Correct answer: B. 10–15 hours
Explanation
The Henssge nomogram (double-exponential model) calculates TSD from rectal temperature, ambient temperature, and body weight. With a body-ambient temperature difference of 5°C (27–22°C) in a 70 kg body, the nomogram yields approximately 10–15 hours TSD. A core temperature difference of <5°C above ambient in a 70 kg body in still air indicates advanced cooling, typically beyond 10 hours. Fully developed rigor mortis (all groups stiffened) is consistent with 8–24 hours, supporting this time window.
Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.
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Written and medically reviewed by the StethoPrep medical team.