Wallace believes there was "orchestrated campaign" against McCabe

At the Charleton tribunal in Dublin on 21 June 2018, Dáil Deputy Mick Wallace gave evidence regarding allegations of a campaign to undermine Garda whistleblower Sergeant Maurice McCabe. Mr Wallace told the tribunal that he believed an orchestrated campaign had been conducted against Sgt McCabe, based on conversations with Superintendent David Taylor, the former Garda Press Officer. Mr Wallace stated that Supt Taylor had expressed remorse for damage caused to Sgt McCabe and his family, though the Deputy acknowledged that Supt Taylor may have embellished aspects of his own treatment. The tribunal is examining allegations that Supt Taylor was directed to smear Sgt McCabe. Former Garda Commissioners Martin Callinan and Nóirín O'Sullivan have denied involvement in any such campaign. Evidence was also heard from RTÉ staff, journalists, and other witnesses regarding conversations about derogatory remarks allegedly made by Commissioner Callinan concerning Sgt McCabe's mental health and conduct.