Ch Supt Harry Breen and Supt Bob Buchanan were murdered by the IRA in March 1989
A public inquiry into the murders of the two most senior Royal Ulster Constabulary officers killed during the Troubles is expected to end today.
The Smithwick Tribunal was set up to investigate claims that local Gardaí colluded in the deaths of RUC Chief Supt Harry Breen and Supt Bob Buchanan.
They were shot dead an an IRA ambush while returning from a meeting in Dundalk Garda Station.
The Dublin-based tribunal is due to hear closing statements today.
Over 200 witnesses have testified since the tribunal was established in 2005, including former IRA members and spies in the British security services.
Many allegations were made, some centring on former garda sergeant Owen Corrigan.
He denied collaborating with the IRA, despite one RUC intelligence document that said he passed on information.
Suspicions have also fallen on two other Dundalk gardai; Leo Colton and Finbarr Hickey.
They too deny leaking information to the IRA.
In a statement to the inquiry, the IRA said the killings were the result of a lengthy surveillance operation and that they had no help from any garda officer.
While one British intelligence document suggested there were several Dundalk gardai up to and over the rank of sergeant leaking to the IRA, another British intelligence document said none of the three mentioned in the tribunal helped the IRA.
The inquiry also heard evidence of the PSNI not passing on recent intelligence on the murders to gardai.
So, the chairman, retired judge Peter Smithwick, will have a difficult task in reaching a definite conclusion with a verdict expected in October.
Talk of the Town 