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.
KV62
This is the only decorated chamber in the tomb, with scenes from the opening of the mouth ceremony (showing Ay, Tutankhamun's successor acting as the king's son, despite being older than he is) and Tutankhamun with the goddess Nut on the north wall, the first hour of Amduat (on the west wall), spell one of the "Book of the Dead" (on the east wall) and representations of the king with various deities (Anubis, Isis, Hathor and others now destroyed) on the south wall. The north wall shows Tutankhamen being followed by his Ka, being welcomed to the underworld by Osiris.