This isn't how the game is supposed to be played and is a symptom of the erosion of the media's journalistic integrity. Anonymous sources can tell you where the bodies are buried, but you still need to dig up the bodies. One would think if you're going through all the trouble to track down three different sources who are both competent and trustworthy to comment on who the government suspects, that you'd take the opportunity to ask a follow up question like "why do you think it was them?" Yeah, everyone wants to be the first to break a story, and real investigation is a lot harder than tabloid journalism, but that's the job, or at least that's what it used to be.