What made Caliph Uthman's death unique was that he was murdered by a slave. (A) "They went back to Medina, stoned Uthman in the mosque and knocked him unconscious, and then besieged him in his house. The elderly caliph told his friends and servants not to resist, to spare their lives, and the rebels broke in and stabbed him to death. His own treasured copy of the Koran was soaked with his blood."