Spontaneous Human Combustion
The term Spontaneous Human Combustion (SHC) is often used to describe alleged cases where human bodies have been found burned without an apparent source of ignition. In many of these cases the burn patterns around the victim are close to the body with little or no burns outside the body and the clothing. The apparently absent ignition source has caused many to claim supernatural explanations such as ghosts, evil spirits, devils or aliens.
There is no evidence available that the human body or any other animal body have ever ignited and burned spontaneously, despite far flung theories such as overactive mithochondria.
It is much more likely that the victims where dead ahead of the burning and the mere proximity to an ignition source made it possible for a body to burn in a way similar to that reported.
Studies with pork bodies have shown evidence for the so called “Wick-effect”. The wick-effect is when a dead clothed body gets ignited with a source such as a cigarette. The cigarette will burn through the clothing and ignite the skin thereby melting the subcutaneous fat and using that as a fuel source and the clothing as a wick, similar to how a candle burns. This type of fire would burn very slowly and with relatively low heat, explaining the burn patterns around the victims.
Deaths that appear to be “spontaneous human combustion” can be explained scientifically. There is no reason to invoke supernatural explanations when there are natural ones readily available.