Tut died by a blow to the back of the head. That's because there is a density at the back of his head. The is also a bump where the density is. The density might result from a hemorrhage under the membranes overlaying the brain in this region. This could have caused by a blow to the back of the head.
There is also a trauma to the back of the head( just where the neck joins the skull), which is very unusual because the location is so well protected. If King Tut have died of an injury there, he'd either suffered from an extremely rare accidents, or someone had purposely attacked him from behind.
It is likely that he was murdered by Ay, his successor, because before King Tut have died, Ay was Tutankhamun and Akhenaten's chief advisor. He could of thought that he was the one who helped King Tut make decisions, and since he has done that well for nineteen years, why not continue that.
Also, King Tut died at age nineteen, the age where he could rule by himself without anyone's help. It's to coincidental that Tut died at that age. It must that someone had plan to kill him and that person is likely to be Ay.
Furthermore, Ankhesenamun asked the Hittite king to send one of his prince to marry her and become pharaoh. On his way, the prince was murdered, likely by Ay, since he wanted the place on the throne. These all prove that King Tut was murdered by Ay.
But there is still gaps, though. The density at the back of the head might resulted from a fall backward, though is rare, it could hapen. There is no rock solid evidence of it resulting from a blow to the head. Maybe Ay became Tut's successor because he was the cheif advisor. It can't positively prove that King Tut died from a blow to the back of the head.
Another legitimate reason of Tut's death is his fractured femur. It might have either resulted from a hunting accident or a war wound. In his tomb, there was a chariot which indicated that they were not merely ceremonial but show signs of wear and tear. Hundreds of arrows recovered from the tomb also show evidence of having been fired and recovered. It indicates that he injured himself while riding that chariot.
But even so, Howard Carter and his team wasn't very careful about handling the mummy. A mummy is a pretty fragile thing, so the fracture could easily made by Howard Carter and his team.
In conclusion, Tut died from a blow to the back of the head. The density at the back of the head, and how the location of King Tut's injury is well protected and is rare that it could be injured in an accident, are all evidence showing this is true.
