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.
KV55
The tomb appears to be unfinished: in the south wall of the burial chamber is a small niche, the commencement of an unfinished antechamber, while red masonry marks within the burial chamber indicate plans for yet another room. When finished these would have made the tomb's layout roughly similar to that of Tutankhamun's. Such a plan seems to indicate that KV55, like KV62, was initially intended as a private burial site and only later taken over for a royal interment.