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
Eventually, the location of the tomb was lost because it had come to be buried by stone chips from subsequent tombs, either dumped there or washed there by floods. In the years that followed, some huts for workers were built over the tomb entrance, clearly without anyone's knowing what lay beneath. When the Valley of the Kings burial sites were systematically dismantled at the end of the 20th Dynasty, Tutankhamun's tomb was overlooked, presumably because knowledge of it had been lost, and his name may have been forgotten.
5,398 items were found in the tomb, including a solid gold coffin, face mask, thrones, archery bows, trumpets, a lotus chalice, food, wine, sandals, and fresh linen underwear. Howard Carter took 10 years to catalog the items. Recent analysis suggests a dagger recovered from the tomb had an iron blade made from a meteorite; study of artifacts of the time including other artifacts from Tutankhamun's tomb could provide valuable insights into metalworking technologies around the Mediterranean at the time.