Board Thread:Fanon Canon 2/@comment-2185383-20140924182221/@comment-24384232-20140927235659

Hiruzen did know, that much is true. In fact he was furious with Danzo for forcing Itachi into a position where he was forced into executing his clan. And Danzo did not offer to save Sasuke. That was a condition for Itachi, otherwise he would have leaked their involvement.