The Independent Monitoring Commission report has found no clues as to who shot former Sinn Féin official Denis Donaldson, who was murdered months after he revealed himself as a British spy.
In April, Donaldson was blasted with a shotgun in a remote cottage in Glenties, Co Donegal, where he had gone into hiding after admitting he had spied on colleagues for more than two decades.
At the time security sources believed disaffected former IRA comrades were behind the attack.
Today's IMC report on IRA activity devoted just one paragraph to the killing: "In our previous report we mentioned the murder of Denis Donaldson in Co Donegal on April 4th, 2006. We said we were not able to attribute responsibility for the murder and would continue to monitor the situation. There has been no change in this situation to date."
Donaldson, a friend of IRA hunger striker Bobby Sands, was a trusted member of Sinn Féin when he was one of three men arrested in October 2002 for allegedly operating a republican spy ring at Stormont.
The allegations led to the collapse in 2002 of power-sharing which has not been revived since.
Within weeks of the case against Donaldson and his co-accused collapsing last December, he declared himself a spy for the previous 20 years in the pay of British intelligence.
PA