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
Kings were venerated after their deaths through mortuary cults and associated temples. Tutankhamun was one of the few kings worshiped in this manner during his lifetime. A stela discovered at Karnak and dedicated to Amun-Ra and Tutankhamun indicates that the king could be appealed to in his deified state for forgiveness and to free the petitioner from an ailment caused by sin. Temples of his cult were built as far away as in Kawa and Faras in Nubia. The title of the sister of the Viceroy of Kush included a reference to the deified king, indicative of the universality of his cult.