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.
Egypt (TV series)
The Carnarvons return to Egypt at the end of the war and Carter recommences his excavation but with a continued lack of results leading to doubts that any undiscovered tombs are left in the valley the funding is finally cut in 1922. Tutankhamun's tomb was well concealed to ensure his undisturbed afterlife. Carter convinces Carnarvon to fund one last season during which the tomb is finally unearthed. When the tomb is opened in the presence of Carnarvon and his daughter it is revealed to be the only unplundered pharaoh's tomb in the valley.