There has been a significant development in the Trevor Deely case.
Gardai are trying to trace a man who was seen outside Trevor's workplace on the night he disappeared.
Trevor Deely from Naas was last seen in December 2000 walking home from his Christmas Party close to Baggot Street Bridge.
Despite numerous appeals, gardai haven’t been able to find out what happened to the 22 year old.
Video footage has since emerged which shows a man who was seen close to Trevor’s workplace in the early hours of that morning.
Trevor went into his work at the Bank of Ireland to speak to his friend before leaving again.
Following advances in technology that image outside the bank has now been enhanced and gardai are hoping to trace this man seen in the area.
The Deely family are going to launch a fresh appeal for help on Friday as they continue their 17 year search to try and find out what happened to Trevor.
Details of a new reward for information will also be unveiled.