The authorities denied that Charles Bishop/Bishra committed an act of terrorism when he stole a plane and crashed it into a bank but that is what his suicide note (released 4 months later) said (and he praised Bin Laden in the second paragraph).
And didn't Moose deny terrorism early in the DC sniper case?
The authorities have lied before. This is not to say they always lie. It is just to mean that a denial means nothing.
There have been many official denials that later proved to be false and others that many suspect are false (Flight 800, Flight 990 for instance). When a broad spectrum of citizens begin to suspect that their government lies to them on a regular basis, the results cannot be good.
Wow. I hadn't heard those details about a suicide note. Why are we being kept in the dark??