Tribunal hears Garda whistleblower accuse superintendent of undermining his work in effort to discredit him

A whistleblower garda has accused a superintendent of "massaging" down crime figures and of trying to discredit him by undermining his police work.

The Disclosures 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.