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.

Key Morris Tribunal witness Sheenagh McMahon today insisted a statement she made retracting allegations of Garda corruption had been the result of “coercion and pressure”.