P0sixninja to Develop Next UnTethered Jailbreak After iOS 6.1.3 - Last night, following our new iOS 6.1.3 jailbreak questions and answers article, p0sixninja sent a couple of rather interesting tweets to his followers on Twitter. For those of you who may be unaware, posixninja, the quondam leader of the now-disasembled Chronic Dev Team, has been instrumental in the development of numerous UnTethered jailbreak utilities, including Greenpois0n, Absinthe and Absinthe version 2. In his first tweet, Joshua Hill (p0sixninja) revealed that he’s been secretly discovering exploits required to develop an Untethered jailbreak since his departure from the legendary Chronic Dev Team.