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.
Curse of the pharaohs
A study of documents and scholarly sources led The Lancet to conclude as unlikely that Carnarvon's death had anything to do with Tutankhamun's tomb, refuting another theory that exposure to toxic fungi (mycotoxins) had contributed to his demise. The report points out that the Earl was only one of many to enter the tomb, on several occasions and that none of the others were affected. The cause of Carnarvon's death was reported as "'pneumonia supervening on [facial] erysipelas,' (a streptococcal infection of the skin and underlying soft tissue). Pneumonia was thought to be only one of various complications, arising from the progressively invasive infection, that eventually resulted in multiorgan failure." The Earl had been "prone to frequent and severe lung infections" according to The Lancet and there had been a "general belief ... that one acute attack of bronchitis could have killed him. In such a debilitated state, the Earl's immune system was easily overwhelmed by erysipelas".
In 1925, the anthropologist Henry Field, accompanied by Breasted, visited the tomb and recalled the kindness and friendliness of Carter. He also reported how a paperweight given to Carter's friend Sir Bruce Ingram was composed of a mummified hand with its wrist adorned with a scarab bracelet marked with, "Cursed be he who moves my body. To him shall come fire, water and pestilence." Soon after receiving the gift, Ingram's house burned down, followed by a flood when it was rebuilt.
Howard Carter was entirely skeptical of such curses. He did report in his diary a "strange" account in May 1926, when he saw jackals of the same type as Anubis, the guardian of the dead, for the first time in over thirty-five years of working in the desert.
Skeptics have pointed out that many others who visited the tomb or helped to discover it lived long and healthy lives. A study showed that of the 58 people who were present when the tomb and sarcophagus were opened, only eight died within a dozen years. All the others were still alive, including Howard Carter, who died of lymphoma in 1939 at the age of 64. The last survivors included Lady Evelyn Herbert, Lord Carnarvon's daughter who was among the first people to enter the tomb after its discovery in November 1922, who lived for a further 57 years and died in 1980, and American archaeologist J.O. Kinnaman who died in 1961, a full 39 years after the event.