1. What is the Glaister Equation?

The Glaister equation is a formula used in forensic medicine to estimate the time since death based on the internal body temperature. It provides a simple calculation method for determining the postmortem interval.

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 per hour (°F/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 and providing valuable evidence in criminal cases.

4. Using the Calculator

Tips: Enter the internal body temperature in °F. The value must be valid (temperature > 0 and ≤ 98.4°F).

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: Environmental temperature, humidity, air movement, body size, clothing, and body position can all influence the cooling rate.

Q3: When is this equation most accurate?
A: The equation is most accurate 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 non-linear cooling patterns that occur later in the postmortem period.

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