So why no investigative journalism on the FBI leaks and Rudy Giuliani? [View all]

Strangely quiet there it seems. Giuliani gave at least three different versions of what he knew about Comey's election intervention and who he was or was not getting information from in terms of active FBI and retired FBI. Surely someone has an FBI source willing to tell some tales as Giuliani certainly did not make them look good with his claims?