There is a point where speculation turns into something else. Of course everyone is a suspect, and investigators are going to pursue every avenue of inquiry. But we know next to nothing about the actual investigation, and have only a tiny fraction of the pictures and video that they have. Here btw is the "cover story" from one of the persons of interest (it doesn't clear him, of course):
one helluva cover story.
The same kind of media reaction occurred right after the OKC bombing. The media waited for the official story on how they should spin the tragedy for the maximum amount of political effect.
This is why clintoon got reelected on such low approval.