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.
Mask of Tutankhamun
Osiris was the Egyptian god of the afterlife. Ancient Egyptians believed that kings preserved in the likeness of Osiris would rule the Kingdom of the Dead. It never totally replaced the older cult of the sun, in which dead kings were thought to be reanimated as the sun-god Re, whose body was made of gold and lapis lazuli. This confluence of old and new beliefs resulted in a mixture of emblems inside Tutankhamun's sarcophagus and tomb.