He certainly had used chemical weapons in the Iran/Iraq war and on the kurds.
But he was not denying the inspectors access to anywhere and no they did not find chemical artillery shells.
By the way he did have chemical weapons when you liberated Kuwait, but with his army was being massacred on the road to hell he did not dare use them against the US.
Which does make me we wonder why he was suddenly in 2002 supposed to be about to commit suicide for no reason and use them on the US. Quite how he was to get them to the US was never explained. But has anyone ever come up with a motive? And also how with no intelligence in Iraq, you were supposed to know this?
The Sock