why is the liver temperature used to tell time of death
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The temperature inside your body is pretty consistent. Everyone have the same core body temperature to a few degrees. So we know the temperature of the body at the moment of death. The body then cools down over time until it reaches ambient temperatures. How long this takes depend on the temperature and environment so these are important factors to consider as well. The outside of the body, near the skin, cools down first and the further away from the skin you get the longer it takes for the body to cool. The liver is pretty much in the centre of the body. So it is the last organ to cool down. Police are able to take the temperature of the liver even if the rest of the body have cooled down. They can then look up in tables depending on the surrounding environment and the weather data of the area. This gives them a rough estimate of how long the body have been dead for.
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