KEY Morris Tribunal witness Sheenagh McMahon faced a grilling yesterday from lawyers after she alleged that garda officers let the IRA bomb a Northern Ireland town.

Sheenagh McMahon, who has rocked the Morris Tribunal with allegations about a garda-permitted IRA bomb in Northern Ireland, faced persistent cross-examination at today’s session of the probe into garda corruption.

THE woman at the centre of the Morris Tribunal has claimed her estranged garda husband held a gun to her head.