Whistleblower withdraws allegation against former Garda Commissioner Nóirín O'Sullivan

A Garda whistleblower has withdrawn an allegation that former Garda Commissioner Nóirín O'Sullivan told a superintendent to "alienate" him, the Disclosures Tribunal has heard.

The tribunal is hearing from Garda Nicholas Keogh who alleges that a senior member of the Athlone drugs unit, identified to the tribunal as Garda A, was in an improper relationship with a heroin dealer, identified as Ms B.