According to this article, from News24.com, Saddam Hussein's lawyer has said that it was Iran, not Iraq who was responsible for the 1988 gassing of the Kurds:
Issam Ghazzawi, who was part of Saddam's defence team, told the daily Die Presse that "Iran is responsible for the murders of the Kurds" killed by poison gas in 1988.
The lawyer was quoted as saying: "Iraq did not possess poison gas at this time."
There is actually evidence to back this up, as this piece from Common Dreams makes clear.
Al-Majid is accused of ordering the 1988 gassing of Kurds at Halabja that killed over 5,000 civilians. He led the bloody suppression of Iraq's Shias, killing tens of thousands. These were the same Shias whom former U.S. president George Bush called to rebel against Saddam's regime, then sat back and did nothing while they were crushed.
The Halabja atrocity remains murky. The CIA's former Iraq desk chief claims Kurds who died at Halabja were killed by cyanide gas, not nerve gas, as is generally believed.
At the time, Iraq and Iran were locked in the ferocious last battles of their eight-year war. Halabja was caught between the two armies that were exchanging salvos of regular and chemical munitions. Only Iran had cyanide gas. If the CIA official is correct, the Kurds were accidentally killed by Iran, not Iraq.