Tributes are being paid to the senior garda who was overseeing the investigation into the Regency Shooting.
It is after Superintendent Colm Fox was found fatally injured at Ballymun Garda Station shortly before 9pm on Saturday.
Foul play is not suspected and Gardaí have referred the case to GSOC.
Crime Journalist Paul Williams says detective Fox was one of the country's most experienced criminal investigators.
He said: "I knew Colm Fox for well over 20 years.
"He came to protect my home and my family at one stage, he was based in Crumlin at the time.
"He was an extremely hard-working, dedicated and diligent police officer who was always prepared to go above and beyond the call of duty."
- Digital Desk