When Esarhaddon named his successors, he split the empire between two of his sons, with Assurbanipal as king of Assyria and Šamaš-šuma-ukīn as king of Babylonia. This arrangement functioned until 652 BCE, at which point a civil war began between the brothers. The war ended with Assurbanipal’s victory and Šamaš-šuma-ukīn’s death in 648 BCE. While Šamaš-šuma-ukīn’s death is mentioned in several of Assurbanipal’s inscriptions, it is still unclear how the king of Babylon met his end, and scholars have suggested theories ranging from suicide, assassination, execution, and accidental death. By offering a reexamination of the evidence for royal death in general and Šamaš-šuma-ukīn’s demise in particular, this article explores how possibly taboo topics such as fratricide, regicide, and suicide were depicted in Neo-Assyrian state texts and how Assurbanipal appears to have coped with his brother’s rebellion and death, especially as compared to Assyrian treatments of belligerent and rebellious foreign kings. This article argues that the relative silence around Šamaššuma- ukīn’s death is due to the fact that, while he was an enemy combatant, he was nonetheless a member of the Assyrian royal family and a legitimately-installed king. Overall, this article concludes that Assurbanipal uses several rhetorical strategies to distance himself from Šamaš-šuma-ukīn, especially invoking deus ex machina as a way to avoid even the potential accusation of fratricide and ultimately erasing his brother from the written record and Assyrian history.