Today marks the sixth anniversary of the disappearance of Kildare bank worker Trevor Deeley. The 22-year-old disappeared while making his way home from a Christmas party.
Sitting in the offices where he works, minutes from the location where his son was last seen, Michael Deeley's voice trails off.
"There'll be a word, there'll be an action or there'll be a look on someone's face and you know, without them saying it, that they're thinking about Trevor . . ."
"It's just all-consuming. People talk about getting over it, but I will never ever forget . . . we have absolutely not given up hope of finding him alive."
It is the same resolve to locate his son, following his mysterious disappearance in the early hours of December 8th, 2000, which led to an unprecedented publicity campaign by his family and friends at the time. This saw posters and flyers bearing his picture appearing across Dublin.
But in spite of the efforts of those involved, for which his family are "incredibly grateful", Mr Deeley acknowledges, that the investigation appears to have come to a halt. Last year, at this time, he called for the setting up of a special "missing persons" unit within the Garda to examine such cases.
He would still like to see such a "proactive rather than reactive" group of officers being set up, but acknowledges the constraints under which gardaí have to operate.
"I think that is the message we'd like to get across. Any scrap of information that anybody has, which they think could or should be relevant, please contact the gardaí at Pearse Street," he said.
A Garda spokesman said Trevor's disappearance remains an "active investigation".
Mr Deeley and his family will hold a prayer service in Naas today.