John Barrett, the suspended HR director of An Garda Siochana, is the subject of a criminal inquiry by the Garda Commissioner into whether he gave false or misleading evidence to the Disclosures Tribunal relating to garda whistleblower Maurice McCabe, the High Court has heard. Barrett, who claims he is facing dismissal from the force as punishment for making a series of protected disclosures – starting with complaints about financial irregularities at the Garda Training College in Templemore – says he only learned of the criminal probe from garda leaks to the media last March.  The court was told the criminal…