Former Garda Press Officer Supt David Taylor has retired from An Garda Síochána as of midnight last night.
His application has been accepted and he has now left the service.
He will receive his garda pension, as he had accumulated the required 30 years of service.
Supt Taylor's retirement application was approved by Garda Commissioner Drew Harris.
It is understood he received legal advice that there was no basis to refuse the application.
It is estimated that Supt Taylor's superintendent salary would have been around €80,000 per year.
This would amount to a tax-free lump sum of €120,000 and an annual pension of around €40,000.
Supt Taylor was heavily criticised in the Disclosures Tribunal report which found that he was part of a campaign to smear garda whistleblower Sgt Maurice McCabe.
Supreme Court Judge Mr Justice Peter Charleton found that Supt Taylor lied on a number of occasions including in a High Court affidavit.
In terms of the Disclosures Tribunal, third party legal costs have not yet been decided and a sitting is likely to hear applications.
Mr Justice Peter Charleton does have discretion on deciding costs and he warned in his report that witnesses before the inquiry were obliged to tell the truth.
He added that if a person had engineered a situation unfairly or deceitfully which resulted in the public expense of a tribunal of inquiry, that fact should be capable of being reflected in a costs order.
The Garda Press Office has declined to comment on the retirement.