First, he certainly lied and kept weapons more recently than 10 years ago; he was about to get a clean bill of health from the inspectors in 1995, until his sons-in-law defected to Jordan and spilled the beans. Given that history (and the absence of people willing to cross Saddam after he had his sons-in-law executed), it was natural that any inspection regime would be apt to be skeptical in the face of ambiguous information.
Despite this, Iraq obstructed inspectors, delayed inspections, refused to update the documents presented last year from those presented years earlier, and frightened scientists into not talking to the inspectors. In short, Iraq acted guilty, as even the favorite source for the Iraq apologists, Hans Blix, stated recently.