1. What is the Glaister Equation?

The Glaister equation is a forensic formula used to estimate the time since death based on the internal body temperature. It provides an approximate calculation of post-mortem interval using the principle of body cooling.

2. How Does the Calculator Work?

The calculator uses the Glaister equation:

Where:

• \( Temp \) — Internal body temperature (°F)
• 98.4 — Normal human body temperature (°F)
• 1.5 — Cooling rate constant (°F per hour)

Explanation: The equation assumes the body cools at an average rate of 1.5°F per hour from the normal body temperature of 98.4°F.

3. Importance of Time Since Death Estimation

Details: Accurate estimation of time since death is crucial for forensic investigations, helping establish timelines, corroborate witness statements, and provide evidence in criminal cases.

4. Using the Calculator

Tips: Enter the internal body temperature in °F. The temperature should be between 0°F and 98.4°F for meaningful results. Measurement should be taken rectally for most accurate results.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the Glaister equation?
A: The Glaister equation provides a rough estimate. Actual cooling rates can vary based on environmental conditions, body size, clothing, and other factors.

Q2: What are the limitations of this method?
A: The equation assumes a constant cooling rate, which may not account for environmental factors, body mass, clothing, or initial temperature variations.

Q3: When is this equation most reliable?
A: Most reliable during the first 24 hours after death and in moderate environmental conditions without extreme temperatures.

Q4: Are there other methods for time since death estimation?
A: Yes, other methods include rigor mortis, livor mortis, decomposition stages, and more sophisticated forensic techniques.

Q5: Should this be used as definitive evidence?
A: This should be used as one piece of evidence among multiple forensic indicators, not as definitive proof in legal proceedings.