Well, maybe he’s not even dead…he changed his appearance, he might well feign his death. In that part of the world, such things do happen. But assuming he is dead, who killed him? Lots of candidates, from us to the saudis to the israelis to the kurds to the druse…he was one of the leading mass murderers in an age of mass murder, he had the attention of lots of people, and there was a reward out for information leading to his death or capture. Even the Iranians might have had a motive. More here.