Tutankhamun's mummy
Detective Michael R. King and FBI profiler Gregory M. Cooper came together with an actual Egyptologist to form their own theory which was that Tutankhamun was murdered. With the use of forensic evidence and their extensive backgrounds in criminology, they came to the conclusion that he was likely murdered by one of his closest advisors, Ay. Ay did succeed Tutankhamun on the throne, so they used that as the motivation for the murder.
Tutankhamun's mummy
Christian Timmann and Christian Meyer, medical doctors and scientists at the Bernhard Nocht Institute for Tropical Medicine in Hamburg, Germany, have used the most recent medical testing done on Tutankhamun's mummy by Dr. Hawass and have concluded that Tutankhamun did not die from a combination of bone disease and malaria, but instead had sickle-cell disease. Dr. Timmann and Dr. Meyer believed the sickle-cell disease turned fatal when Tutankhamun also contracted severe malaria that was rampant in Ancient Egypt during his era. He is expected to have been homozygous recessive for the sickle cell gene, thus making him not immune to severe malaria, which would have been fatal.