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 calculates the approximate hours that have passed since death occurred by measuring the temperature difference from normal body temperature.

2. How Does the Calculator Work?

The calculator uses the Glaister equation:

Where:

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

Explanation: The equation assumes a linear cooling 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 accurate results.

5. Frequently Asked Questions (FAQ)

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

Q2: What factors affect body cooling rate?
A: Ambient temperature, humidity, air movement, body weight, clothing, and body position can all influence the cooling rate.

Q3: When is this equation most accurate?
A: The equation works best during the first 12-24 hours after death in moderate environmental conditions.

Q4: Are there limitations to this equation?
A: Yes, it doesn't account for environmental factors, body composition, or the plateau phase of cooling immediately after death.

Q5: Should this be used as definitive evidence?
A: No, this should be used as one of several methods to estimate time since death and should be corroborated with other forensic evidence.