Osama bin Laden's sensational denial was not reported by the US print and TV media. It was not investigated by the executive branch. No one in the US Congress called attention to bin Laden's refusal of responsibility for the greatest humiliation ever inflicted on a superpower.
To check my memory of the lack of coverage, I googled "Osama bin Laden's interview denying responsibility for 9/11." Some Internet sites reproduced the interview, but the only mainstream news source that I found was a 1 minute YouTube video from CNN in which the anchor, after quoting an al Jazeera report of bin Laden's denial, concludes that "we can all weigh that in the scale of credibility and come to our own conclusions." In other words, bin Laden had already been demonized, and his denial was not credible.
The sensational news was unfit for US citizens and was withheld from them by the american "free press," a press free to lie for the government but not to tell the truth.