The Garda Commissioner says he is horrified by the findings of Garda collusion in the murders of two senior RUC officers in 1989.

The Smithwick Tribunal report says that while there is no direct evidence, on the balance of probabilities collusion did occur.

Chief Superintendent Harry Breen and Superintendent Bob Buchanan were shot dead by the IRA in South Armagh after crossing the border.

They had been attending a meeting at Dundalk Garda station in Co. Louth.

Martin Callinan says he fully accepts the findings and that the collusion is a betrayal of the Garda Siochana.

The solicitor for the family of murdered RUC officer Pat Breen has described Sinn Féin leader Gerry Adams as an apologist for terrorists.

John McBurney made the comments on The Pat Kenny Show here on Newstalk, after the Louth deputy said Breen and his deceased colleague Bob Buchanan had a 'laissez faire' approach to their personal security.

Buchanan and Breen were killed in an IRA ambush in 1989 in south Armagh. Judge Peter Smithwick's findings that garda collusion was behind their targeting were released yesterday.

Speaking to Newstalk Breakfast about the findings of the Smithwick Tribunal's report, Gerry Adams said the officers were openly sitting outside Dundalk garda station, prior to the attack.

The Minister for Justice Alan Shatter and Tánaiste Eamon Gilmore have both made apologies.

Justice Minister Shatter told Breakfast here on Newstalk the reputation of An Garda Síochána has not been damaged. He also said it is very unlikely the garda mole will ever be found.