In late 2013, Egyptologist Dr. Chris Naunton and scientists from the Cranfield Institute performed a "virtual autopsy" of Tutankhamun, revealing a pattern of injuries down one side of his body. Car-crash investigators then created computer simulations of chariot accidents. Naunton concluded that Tutankhamun was killed in a chariot crash. Dr. Matthew Ponting, Naunton produced evidence that Tutankhamun's body was burnt while sealed inside his coffin. Embalming oils combined with oxygen and linen had caused a chemical reaction, creating temperatures of more than 200 °C. Naunton said, "The charring and possibility that a botched mummification led to the body spontaneously combusting shortly after burial was entirely unexpected