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
The country was economically weak and in turmoil following the reign of Akhenaten. Diplomatic relations with other kingdoms had been neglected, and Tutankhamun sought to restore them, in particular with the Mitanni. Evidence of his success is suggested by the gifts from various countries found in his tomb. Despite his efforts for improved relations, battles with Nubians and Asiatics were recorded in his mortuary temple at Thebes. His tomb contained body armor, folding stools appropriate for military campaigns, and bows, and he was trained in archery. However, given his youth (he died c. age 18) and physical disabilities, which seemed to require the use of a cane in order to walk, most historians speculate that he did not personally take part in these battles.