The bankruptcy of Enron (Enron filed for bankruptcy on December 2, 2001) was a huge failure for the press. How is possible that journalists couldn't see what was happening?
On 5th March 2001, Bethany McLean wrote an article for Fortune Magazine: "Is Enron overpriced?" and in 2003 she was the co-author of the book "Enron: The smartest guys in the room"; in January 2005 the documentary (with the same title) was aired in the USA.
Here you can read "Enron: uncovering the uncovered story" (March 2002) from Columbia Journalism Review (an academic publication providing coverage and analysis of journalism).
If a CEO doesn't say the truth, you can charge him/her; but what can you do when "the truth" is hidden somewhere in million of pages?